23 files changed, 572 insertions, 132 deletions

diff --git a/doc/classes/EditorPlugin.xml b/doc/classes/EditorPlugin.xml
index 61f1761249..f6f51df7c0 100644
--- a/doc/classes/EditorPlugin.xml
+++ b/doc/classes/EditorPlugin.xml
@@ -157,6 +157,16 @@
 				Registers a custom translation parser plugin for extracting translatable strings from custom files.
 			</description>
 		</method>
+		<method name="add_undo_redo_inspector_hook_callback">
+			<return type="void">
+			</return>
+			<argument index="0" name="callable" type="Callable">
+			</argument>
+			<description>
+				Hooks a callback into the undo/redo action creation when a property is modified in the inspector. This allows, for example, to save other properties that may be lost when a given property is modified.
+				The callback should have 4 arguments: [Object] [code]undo_redo[/code], [Object] [code]modified_object[/code], [String] [code]property[/code] and [Variant] [code]new_value[/code]. They are, respectively, the [UndoRedo] object used by the inspector, the currently modified object, the name of the modified property and the new value the property is about to take.
+			</description>
+		</method>
 		<method name="apply_changes" qualifiers="virtual">
 			<return type="void">
 			</return>
@@ -622,6 +632,15 @@
 				Removes a registered custom translation parser plugin.
 			</description>
 		</method>
+		<method name="remove_undo_redo_inspector_hook_callback">
+			<return type="void">
+			</return>
+			<argument index="0" name="callable" type="Callable">
+			</argument>
+			<description>
+				Removes a callback previsously added by [method add_undo_redo_inspector_hook_callback].
+			</description>
+		</method>
 		<method name="save_external_data" qualifiers="virtual">
 			<return type="void">
 			</return>
diff --git a/doc/classes/ScrollContainer.xml b/doc/classes/ScrollContainer.xml
index 9c5634f43a..40e29ac74b 100644
--- a/doc/classes/ScrollContainer.xml
+++ b/doc/classes/ScrollContainer.xml
@@ -39,12 +39,18 @@
 		<member name="scroll_horizontal_enabled" type="bool" setter="set_enable_h_scroll" getter="is_h_scroll_enabled" default="true">
 			If [code]true[/code], enables horizontal scrolling.
 		</member>
+		<member name="scroll_horizontal_visible" type="bool" setter="set_h_scroll_visible" getter="is_h_scroll_visible" default="true">
+			If [code]false[/code], hides the horizontal scrollbar.
+		</member>
 		<member name="scroll_vertical" type="int" setter="set_v_scroll" getter="get_v_scroll" default="0">
 			The current vertical scroll value.
 		</member>
 		<member name="scroll_vertical_enabled" type="bool" setter="set_enable_v_scroll" getter="is_v_scroll_enabled" default="true">
 			If [code]true[/code], enables vertical scrolling.
 		</member>
+		<member name="scroll_vertical_visible" type="bool" setter="set_v_scroll_visible" getter="is_v_scroll_visible" default="true">
+			If [code]false[/code], hides the vertical scrollbar.
+		</member>
 	</members>
 	<signals>
 		<signal name="scroll_ended">
diff --git a/editor/editor_about.cpp b/editor/editor_about.cpp
index d962658484..7527514dca 100644
--- a/editor/editor_about.cpp
+++ b/editor/editor_about.cpp
@@ -37,6 +37,9 @@
 #include "core/version.h"
 #include "core/version_hash.gen.h"
 
+// The metadata key used to store and retrieve the version text to copy to the clipboard.
+static const String META_TEXT_TO_COPY = "text_to_copy";
+
 void EditorAbout::_theme_changed() {
 	const Ref<Font> font = get_theme_font("source", "EditorFonts");
 	const int font_size = get_theme_font_size("source_size", "EditorFonts");
@@ -63,7 +66,12 @@ void EditorAbout::_license_tree_selected() {
 	_tpl_text->set_text(selected->get_metadata(0));
 }
 
+void EditorAbout::_version_button_pressed() {
+	DisplayServer::get_singleton()->clipboard_set(version_btn->get_meta(META_TEXT_TO_COPY));
+}
+
 void EditorAbout::_bind_methods() {
+	ClassDB::bind_method(D_METHOD("_version_button_pressed"), &EditorAbout::_version_button_pressed);
 }
 
 TextureRect *EditorAbout::get_logo() const {
@@ -124,17 +132,32 @@ EditorAbout::EditorAbout() {
 	_logo = memnew(TextureRect);
 	hbc->add_child(_logo);
 
+	VBoxContainer *version_info_vbc = memnew(VBoxContainer);
+
+	// Add a dummy control node for spacing.
+	Control *v_spacer = memnew(Control);
+	version_info_vbc->add_child(v_spacer);
+
+	version_btn = memnew(LinkButton);
 	String hash = String(VERSION_HASH);
 	if (hash.length() != 0) {
 		hash = "." + hash.left(9);
 	}
+	version_btn->set_text(VERSION_FULL_NAME + hash);
+	// Set the text to copy in metadata as it slightly differs from the button's text.
+	version_btn->set_meta(META_TEXT_TO_COPY, "v" VERSION_FULL_BUILD + hash);
+	version_btn->set_underline_mode(LinkButton::UNDERLINE_MODE_ON_HOVER);
+	version_btn->set_tooltip(TTR("Click to copy."));
+	version_btn->connect("pressed", callable_mp(this, &EditorAbout::_version_button_pressed));
+	version_info_vbc->add_child(version_btn);
 
 	Label *about_text = memnew(Label);
 	about_text->set_v_size_flags(Control::SIZE_SHRINK_CENTER);
-	about_text->set_text(VERSION_FULL_NAME + hash +
-						 String::utf8("\n\xc2\xa9 2007-2021 Juan Linietsky, Ariel Manzur.\n\xc2\xa9 2014-2021 ") +
+	about_text->set_text(String::utf8("\xc2\xa9 2007-2021 Juan Linietsky, Ariel Manzur.\n\xc2\xa9 2014-2021 ") +
 						 TTR("Godot Engine contributors") + "\n");
-	hbc->add_child(about_text);
+	version_info_vbc->add_child(about_text);
+
+	hbc->add_child(version_info_vbc);
 
 	TabContainer *tc = memnew(TabContainer);
 	tc->set_custom_minimum_size(Size2(950, 400) * EDSCALE);
diff --git a/editor/editor_about.h b/editor/editor_about.h
index 2823220a8a..b76a2ada34 100644
--- a/editor/editor_about.h
+++ b/editor/editor_about.h
@@ -34,6 +34,7 @@
 #include "scene/gui/control.h"
 #include "scene/gui/dialogs.h"
 #include "scene/gui/item_list.h"
+#include "scene/gui/link_button.h"
 #include "scene/gui/rich_text_label.h"
 #include "scene/gui/scroll_container.h"
 #include "scene/gui/separator.h"
@@ -53,8 +54,10 @@ class EditorAbout : public AcceptDialog {
 
 private:
 	void _license_tree_selected();
+	void _version_button_pressed();
 	ScrollContainer *_populate_list(const String &p_name, const List<String> &p_sections, const char *const *const p_src[], const int p_flag_single_column = 0);
 
+	LinkButton *version_btn;
 	Tree *_tpl_tree;
 	RichTextLabel *_license_text;
 	RichTextLabel *_tpl_text;
diff --git a/editor/editor_data.cpp b/editor/editor_data.cpp
index fa4703d425..6405af3876 100644
--- a/editor/editor_data.cpp
+++ b/editor/editor_data.cpp
@@ -426,6 +426,18 @@ UndoRedo &EditorData::get_undo_redo() {
 	return undo_redo;
 }
 
+void EditorData::add_undo_redo_inspector_hook_callback(Callable p_callable) {
+	undo_redo_callbacks.push_back(p_callable);
+}
+
+void EditorData::remove_undo_redo_inspector_hook_callback(Callable p_callable) {
+	undo_redo_callbacks.erase(p_callable);
+}
+
+const Vector<Callable> EditorData::get_undo_redo_inspector_hook_callback() {
+	return undo_redo_callbacks;
+}
+
 void EditorData::remove_editor_plugin(EditorPlugin *p_plugin) {
 	p_plugin->undo_redo = nullptr;
 	editor_plugins.erase(p_plugin);
diff --git a/editor/editor_data.h b/editor/editor_data.h
index dbe729d9d9..2ece94d6a3 100644
--- a/editor/editor_data.h
+++ b/editor/editor_data.h
@@ -132,6 +132,7 @@ private:
 
 	List<PropertyData> clipboard;
 	UndoRedo undo_redo;
+	Vector<Callable> undo_redo_callbacks;
 
 	void _cleanup_history();
 
@@ -166,6 +167,9 @@ public:
 	EditorPlugin *get_editor_plugin(int p_idx);
 
 	UndoRedo &get_undo_redo();
+	void add_undo_redo_inspector_hook_callback(Callable p_callable); // Callbacks shoud have 4 args: (Object* undo_redo, Object *modified_object, String property, Varian new_value)
+	void remove_undo_redo_inspector_hook_callback(Callable p_callable);
+	const Vector<Callable> get_undo_redo_inspector_hook_callback();
 
 	void save_editor_global_states();
 	void restore_editor_global_states();
diff --git a/editor/editor_inspector.cpp b/editor/editor_inspector.cpp
index 738b2f9f82..5bb3c8b4d0 100644
--- a/editor/editor_inspector.cpp
+++ b/editor/editor_inspector.cpp
@@ -2266,6 +2266,22 @@ void EditorInspector::_edit_set(const String &p_name, const Variant &p_value, bo
 		undo_redo->add_do_property(object, p_name, p_value);
 		undo_redo->add_undo_property(object, p_name, object->get(p_name));
 
+		Variant v_undo_redo = (Object *)undo_redo;
+		Variant v_object = object;
+		Variant v_name = p_name;
+		for (int i = 0; i < EditorNode::get_singleton()->get_editor_data().get_undo_redo_inspector_hook_callback().size(); i++) {
+			const Callable &callback = EditorNode::get_singleton()->get_editor_data().get_undo_redo_inspector_hook_callback()[i];
+
+			const Variant *p_arguments[] = { &v_undo_redo, &v_object, &v_name, &p_value };
+			Variant return_value;
+			Callable::CallError call_error;
+
+			callback.call(p_arguments, 4, return_value, call_error);
+			if (call_error.error != Callable::CallError::CALL_OK) {
+				ERR_PRINT("Invalid UndoRedo callback.");
+			}
+		}
+
 		if (p_refresh_all) {
 			undo_redo->add_do_method(this, "_edit_request_change", object, "");
 			undo_redo->add_undo_method(this, "_edit_request_change", object, "");
diff --git a/editor/editor_log.cpp b/editor/editor_log.cpp
index 7b94016fb6..3957f981be 100644
--- a/editor/editor_log.cpp
+++ b/editor/editor_log.cpp
@@ -63,6 +63,18 @@ void EditorLog::_notification(int p_what) {
 		log->add_theme_font_override("normal_font", get_theme_font("output_source", "EditorFonts"));
 		log->add_theme_font_size_override("normal_font_size", get_theme_font_size("output_source_size", "EditorFonts"));
 		log->add_theme_color_override("selection_color", get_theme_color("accent_color", "Editor") * Color(1, 1, 1, 0.4));
+		log->add_theme_font_override("bold_font", get_theme_font("bold", "EditorFonts"));
+
+		type_filter_map[MSG_TYPE_STD]->toggle_button->set_icon(get_theme_icon("Popup", "EditorIcons"));
+		type_filter_map[MSG_TYPE_ERROR]->toggle_button->set_icon(get_theme_icon("StatusError", "EditorIcons"));
+		type_filter_map[MSG_TYPE_WARNING]->toggle_button->set_icon(get_theme_icon("StatusWarning", "EditorIcons"));
+		type_filter_map[MSG_TYPE_EDITOR]->toggle_button->set_icon(get_theme_icon("Edit", "EditorIcons"));
+
+		clear_button->set_icon(get_theme_icon("Clear", "EditorIcons"));
+		copy_button->set_icon(get_theme_icon("ActionCopy", "EditorIcons"));
+		collapse_button->set_icon(get_theme_icon("CombineLines", "EditorIcons"));
+		show_search_button->set_icon(get_theme_icon("Search", "EditorIcons"));
+
 	} else if (p_what == NOTIFICATION_THEME_CHANGED) {
 		Ref<Font> df_output_code = get_theme_font("output_source", "EditorFonts");
 		if (df_output_code.is_valid()) {
@@ -75,8 +87,15 @@ void EditorLog::_notification(int p_what) {
 	}
 }
 
+void EditorLog::_set_collapse(bool p_collapse) {
+	collapse = p_collapse;
+	_rebuild_log();
+}
+
 void EditorLog::_clear_request() {
 	log->clear();
+	messages.clear();
+	_reset_message_counts();
 	tool_button->set_icon(Ref<Texture2D>());
 }
 
@@ -96,13 +115,83 @@ void EditorLog::clear() {
 	_clear_request();
 }
 
-void EditorLog::copy() {
-	_copy_request();
+void EditorLog::_process_message(const String &p_msg, MessageType p_type) {
+	if (messages.size() > 0 && messages[messages.size() - 1].text == p_msg) {
+		// If previous message is the same as the new one, increase previous count rather than adding another
+		// instance to the messages list.
+		LogMessage &previous = messages.write[messages.size() - 1];
+		previous.count++;
+
+		_add_log_line(previous, collapse);
+	} else {
+		// Different message to the previous one received.
+		LogMessage message(p_msg, p_type);
+		_add_log_line(message);
+		messages.push_back(message);
+	}
+
+	type_filter_map[p_type]->set_message_count(type_filter_map[p_type]->get_message_count() + 1);
 }
 
 void EditorLog::add_message(const String &p_msg, MessageType p_type) {
-	bool restore = p_type != MSG_TYPE_STD;
-	switch (p_type) {
+	// Make text split by new lines their own message.
+	// See #41321 for reasoning. At time of writing, multiple print()'s in running projects
+	// get grouped together and sent to the editor log as one message. This can mess with the
+	// search functionality (see the comments on the PR above for more details). This behaviour
+	// also matches that of other IDE's.
+	Vector<String> lines = p_msg.split("\n", false);
+
+	for (int i = 0; i < lines.size(); i++) {
+		_process_message(lines[i], p_type);
+	}
+}
+
+void EditorLog::set_tool_button(Button *p_tool_button) {
+	tool_button = p_tool_button;
+}
+
+void EditorLog::_undo_redo_cbk(void *p_self, const String &p_name) {
+	EditorLog *self = (EditorLog *)p_self;
+	self->add_message(p_name, EditorLog::MSG_TYPE_EDITOR);
+}
+
+void EditorLog::_rebuild_log() {
+	log->clear();
+
+	for (int msg_idx = 0; msg_idx < messages.size(); msg_idx++) {
+		LogMessage msg = messages[msg_idx];
+
+		if (collapse) {
+			// If collapsing, only log one instance of the message.
+			_add_log_line(msg);
+		} else {
+			// If not collapsing, log each instance on a line.
+			for (int i = 0; i < msg.count; i++) {
+				_add_log_line(msg);
+			}
+		}
+	}
+}
+
+void EditorLog::_add_log_line(LogMessage &p_message, bool p_replace_previous) {
+	// Only add the message to the log if it passes the filters.
+	bool filter_active = type_filter_map[p_message.type]->active;
+	String search_text = search_box->get_text();
+	bool search_match = search_text == String() || p_message.text.findn(search_text) > -1;
+
+	if (!filter_active || !search_match) {
+		return;
+	}
+
+	if (p_replace_previous) {
+		// Remove last line if replacing, as it will be replace by the next added line.
+		log->remove_line(log->get_line_count() - 1);
+		log->increment_line_count();
+	} else {
+		log->add_newline();
+	}
+
+	switch (p_message.type) {
 		case MSG_TYPE_STD: {
 		} break;
 		case MSG_TYPE_ERROR: {
@@ -125,21 +214,42 @@ void EditorLog::add_message(const String &p_msg, MessageType p_type) {
 		} break;
 	}
 
-	log->add_text(p_msg);
-	log->add_newline();
+	// If collapsing, add the count of this message in bold at the start of the line.
+	if (collapse && p_message.count > 1) {
+		log->push_bold();
+		log->add_text(vformat("(%s) ", itos(p_message.count)));
+		log->pop();
+	}
 
-	if (restore) {
+	log->add_text(p_message.text);
+
+	// Need to use pop() to exit out of the RichTextLabels current "push" stack.
+	// We only "push" in the above swicth when message type != STD, so only pop when that is the case.
+	if (p_message.type != MSG_TYPE_STD) {
 		log->pop();
 	}
 }
 
-void EditorLog::set_tool_button(Button *p_tool_button) {
-	tool_button = p_tool_button;
+void EditorLog::_set_filter_active(bool p_active, MessageType p_message_type) {
+	type_filter_map[p_message_type]->active = p_active;
+	_rebuild_log();
 }
 
-void EditorLog::_undo_redo_cbk(void *p_self, const String &p_name) {
-	EditorLog *self = (EditorLog *)p_self;
-	self->add_message(p_name, EditorLog::MSG_TYPE_EDITOR);
+void EditorLog::_set_search_visible(bool p_visible) {
+	search_box->set_visible(p_visible);
+	if (p_visible) {
+		search_box->grab_focus();
+	}
+}
+
+void EditorLog::_search_changed(const String &p_text) {
+	_rebuild_log();
+}
+
+void EditorLog::_reset_message_counts() {
+	for (Map<MessageType, LogFilter *>::Element *E = type_filter_map.front(); E; E = E->next()) {
+		E->value()->set_message_count(0);
+	}
 }
 
 void EditorLog::_bind_methods() {
@@ -148,37 +258,105 @@ void EditorLog::_bind_methods() {
 }
 
 EditorLog::EditorLog() {
-	VBoxContainer *vb = this;
-
-	HBoxContainer *hb = memnew(HBoxContainer);
-	vb->add_child(hb);
-	title = memnew(Label);
-	title->set_text(TTR("Output:"));
-	title->set_h_size_flags(SIZE_EXPAND_FILL);
-	hb->add_child(title);
-
-	copybutton = memnew(Button);
-	hb->add_child(copybutton);
-	copybutton->set_text(TTR("Copy"));
-	copybutton->set_shortcut(ED_SHORTCUT("editor/copy_output", TTR("Copy Selection"), KEY_MASK_CMD | KEY_C));
-	copybutton->set_shortcut_context(this);
-	copybutton->connect("pressed", callable_mp(this, &EditorLog::_copy_request));
-
-	clearbutton = memnew(Button);
-	hb->add_child(clearbutton);
-	clearbutton->set_text(TTR("Clear"));
-	clearbutton->set_shortcut(ED_SHORTCUT("editor/clear_output", TTR("Clear Output"), KEY_MASK_CMD | KEY_MASK_SHIFT | KEY_K));
-	clearbutton->set_shortcut_context(this);
-	clearbutton->connect("pressed", callable_mp(this, &EditorLog::_clear_request));
+	HBoxContainer *hb = this;
 
+	VBoxContainer *vb_left = memnew(VBoxContainer);
+	vb_left->set_custom_minimum_size(Size2(0, 180) * EDSCALE);
+	vb_left->set_v_size_flags(SIZE_EXPAND_FILL);
+	vb_left->set_h_size_flags(SIZE_EXPAND_FILL);
+	hb->add_child(vb_left);
+
+	// Log - Rich Text Label.
 	log = memnew(RichTextLabel);
 	log->set_scroll_follow(true);
 	log->set_selection_enabled(true);
 	log->set_focus_mode(FOCUS_CLICK);
-	log->set_custom_minimum_size(Size2(0, 180) * EDSCALE);
 	log->set_v_size_flags(SIZE_EXPAND_FILL);
 	log->set_h_size_flags(SIZE_EXPAND_FILL);
-	vb->add_child(log);
+	vb_left->add_child(log);
+
+	// Search box
+	search_box = memnew(LineEdit);
+	search_box->set_h_size_flags(Control::SIZE_EXPAND_FILL);
+	search_box->set_placeholder(TTR("Filter messages"));
+	search_box->set_right_icon(get_theme_icon("Search", "EditorIcons"));
+	search_box->set_clear_button_enabled(true);
+	search_box->set_visible(true);
+	search_box->connect("text_changed", callable_mp(this, &EditorLog::_search_changed));
+	vb_left->add_child(search_box);
+
+	VBoxContainer *vb_right = memnew(VBoxContainer);
+	hb->add_child(vb_right);
+
+	// Tools grid
+	HBoxContainer *hb_tools = memnew(HBoxContainer);
+	hb_tools->set_h_size_flags(SIZE_SHRINK_CENTER);
+	vb_right->add_child(hb_tools);
+
+	// Clear.
+	clear_button = memnew(Button);
+	clear_button->set_flat(true);
+	clear_button->set_focus_mode(FOCUS_NONE);
+	clear_button->set_shortcut(ED_SHORTCUT("editor/clear_output", TTR("Clear Output"), KEY_MASK_CMD | KEY_MASK_SHIFT | KEY_K));
+	clear_button->connect("pressed", callable_mp(this, &EditorLog::_clear_request));
+	hb_tools->add_child(clear_button);
+
+	// Copy.
+	copy_button = memnew(Button);
+	copy_button->set_flat(true);
+	copy_button->set_focus_mode(FOCUS_NONE);
+	copy_button->set_shortcut(ED_SHORTCUT("editor/copy_output", TTR("Copy Selection"), KEY_MASK_CMD | KEY_C));
+	copy_button->connect("pressed", callable_mp(this, &EditorLog::_copy_request));
+	hb_tools->add_child(copy_button);
+
+	// A second hbox to make a 2x2 grid of buttons.
+	HBoxContainer *hb_tools2 = memnew(HBoxContainer);
+	hb_tools2->set_h_size_flags(SIZE_SHRINK_CENTER);
+	vb_right->add_child(hb_tools2);
+
+	// Collapse.
+	collapse_button = memnew(Button);
+	collapse_button->set_flat(true);
+	collapse_button->set_focus_mode(FOCUS_NONE);
+	collapse_button->set_tooltip(TTR("Collapse duplicate messages into one log entry. Shows number of occurences."));
+	collapse_button->set_toggle_mode(true);
+	collapse_button->set_pressed(false);
+	collapse_button->connect("toggled", callable_mp(this, &EditorLog::_set_collapse));
+	hb_tools2->add_child(collapse_button);
+
+	// Show Search.
+	show_search_button = memnew(Button);
+	show_search_button->set_flat(true);
+	show_search_button->set_focus_mode(FOCUS_NONE);
+	show_search_button->set_toggle_mode(true);
+	show_search_button->set_pressed(true);
+	show_search_button->set_shortcut(ED_SHORTCUT("editor/open_search", TTR("Open the search box."), KEY_MASK_CMD | KEY_F));
+	show_search_button->connect("toggled", callable_mp(this, &EditorLog::_set_search_visible));
+	hb_tools2->add_child(show_search_button);
+
+	// Message Type Filters.
+	vb_right->add_child(memnew(HSeparator));
+
+	LogFilter *std_filter = memnew(LogFilter(MSG_TYPE_STD));
+	std_filter->initialize_button("Toggle visibility of standard output messages.", callable_mp(this, &EditorLog::_set_filter_active));
+	vb_right->add_child(std_filter->toggle_button);
+	type_filter_map.insert(MSG_TYPE_STD, std_filter);
+
+	LogFilter *error_filter = memnew(LogFilter(MSG_TYPE_ERROR));
+	error_filter->initialize_button("Toggle visibility of errors.", callable_mp(this, &EditorLog::_set_filter_active));
+	vb_right->add_child(error_filter->toggle_button);
+	type_filter_map.insert(MSG_TYPE_ERROR, error_filter);
+
+	LogFilter *warning_filter = memnew(LogFilter(MSG_TYPE_WARNING));
+	warning_filter->initialize_button("Toggle visibility of warnings.", callable_mp(this, &EditorLog::_set_filter_active));
+	vb_right->add_child(warning_filter->toggle_button);
+	type_filter_map.insert(MSG_TYPE_WARNING, warning_filter);
+
+	LogFilter *editor_filter = memnew(LogFilter(MSG_TYPE_EDITOR));
+	editor_filter->initialize_button("Toggle visibility of editor messages.", callable_mp(this, &EditorLog::_set_filter_active));
+	vb_right->add_child(editor_filter->toggle_button);
+	type_filter_map.insert(MSG_TYPE_EDITOR, editor_filter);
+
 	add_message(VERSION_FULL_NAME " (c) 2007-2021 Juan Linietsky, Ariel Manzur & Godot Contributors.");
 
 	eh.errfunc = _error_handler;
@@ -187,8 +365,6 @@ EditorLog::EditorLog() {
 
 	current = Thread::get_caller_id();
 
-	add_theme_constant_override("separation", get_theme_constant("separation", "VBoxContainer"));
-
 	EditorNode::get_undo_redo()->set_commit_notify_callback(_undo_redo_cbk, this);
 }
 
@@ -197,4 +373,7 @@ void EditorLog::deinit() {
 }
 
 EditorLog::~EditorLog() {
+	for (Map<MessageType, LogFilter *>::Element *E = type_filter_map.front(); E; E = E->next()) {
+		memdelete(E->get());
+	}
 }
diff --git a/editor/editor_log.h b/editor/editor_log.h
index 79dfb3ffaa..89d00d0fa0 100644
--- a/editor/editor_log.h
+++ b/editor/editor_log.h
@@ -36,19 +36,92 @@
 #include "scene/gui/button.h"
 #include "scene/gui/control.h"
 #include "scene/gui/label.h"
+#include "scene/gui/line_edit.h"
 #include "scene/gui/panel_container.h"
 #include "scene/gui/rich_text_label.h"
 #include "scene/gui/texture_button.h"
 #include "scene/gui/texture_rect.h"
 
-class EditorLog : public VBoxContainer {
-	GDCLASS(EditorLog, VBoxContainer);
+class EditorLog : public HBoxContainer {
+	GDCLASS(EditorLog, HBoxContainer);
+
+public:
+	enum MessageType {
+		MSG_TYPE_STD,
+		MSG_TYPE_ERROR,
+		MSG_TYPE_WARNING,
+		MSG_TYPE_EDITOR,
+	};
+
+private:
+	struct LogMessage {
+		String text;
+		MessageType type;
+		int count = 1;
+
+		LogMessage() {}
+
+		LogMessage(const String p_text, MessageType p_type) :
+				text(p_text),
+				type(p_type) {
+		}
+	};
+
+	// Encapsulates all data and functionality regarding filters.
+	struct LogFilter {
+	private:
+		// Force usage of set method since it has functionality built-in.
+		int message_count = 0;
+
+	public:
+		MessageType type;
+		Button *toggle_button = nullptr;
+		bool active = true;
+
+		void initialize_button(const String &p_tooltip, Callable p_toggled_callback) {
+			toggle_button = memnew(Button);
+			toggle_button->set_toggle_mode(true);
+			toggle_button->set_pressed(true);
+			toggle_button->set_text(itos(message_count));
+			toggle_button->set_tooltip(TTR(p_tooltip));
+			// Don't tint the icon even when in "pressed" state.
+			toggle_button->add_theme_color_override("icon_color_pressed", Color(1, 1, 1, 1));
+			toggle_button->set_focus_mode(FOCUS_NONE);
+			// When toggled call the callback and pass the MessageType this button is for.
+			toggle_button->connect("toggled", p_toggled_callback, varray(type));
+		}
+
+		int get_message_count() {
+			return message_count;
+		}
+
+		void set_message_count(int p_count) {
+			message_count = p_count;
+			toggle_button->set_text(itos(message_count));
+		}
+
+		LogFilter(MessageType p_type) :
+				type(p_type) {
+		}
+	};
+
+	Vector<LogMessage> messages;
+	// Maps MessageTypes to LogFilters for convenient access and storage (don't need 1 member per filter).
+	Map<MessageType, LogFilter *> type_filter_map;
 
-	Button *clearbutton;
-	Button *copybutton;
-	Label *title;
 	RichTextLabel *log;
-	HBoxContainer *title_hb;
+
+	Button *clear_button;
+	Button *copy_button;
+
+	Button *collapse_button;
+	bool collapse = false;
+
+	Button *show_search_button;
+	LineEdit *search_box;
+
+	// Reference to the "Output" button on the toolbar so we can update it's icon when
+	// Warnings or Errors are encounetered.
 	Button *tool_button;
 
 	static void _error_handler(void *p_self, const char *p_func, const char *p_file, int p_line, const char *p_error, const char *p_errorexp, ErrorHandlerType p_type);
@@ -62,26 +135,33 @@ class EditorLog : public VBoxContainer {
 	void _copy_request();
 	static void _undo_redo_cbk(void *p_self, const String &p_name);
 
+	void _rebuild_log();
+	void _add_log_line(LogMessage &p_message, bool p_replace_previous = false);
+
+	void _set_filter_active(bool p_active, MessageType p_message_type);
+	void _set_search_visible(bool p_visible);
+	void _search_changed(const String &p_text);
+
+	void _process_message(const String &p_msg, MessageType p_type);
+	void _reset_message_counts();
+
+	void _set_collapse(bool p_collapse);
+
 protected:
 	static void _bind_methods();
 	void _notification(int p_what);
 
 public:
-	enum MessageType {
-		MSG_TYPE_STD,
-		MSG_TYPE_ERROR,
-		MSG_TYPE_WARNING,
-		MSG_TYPE_EDITOR
-	};
-
 	void add_message(const String &p_msg, MessageType p_type = MSG_TYPE_STD);
 	void set_tool_button(Button *p_tool_button);
 	void deinit();
 
 	void clear();
-	void copy();
+
 	EditorLog();
 	~EditorLog();
 };
 
+VARIANT_ENUM_CAST(EditorLog::MessageType);
+
 #endif // EDITOR_LOG_H
diff --git a/editor/editor_node.cpp b/editor/editor_node.cpp
index b7713a9d52..0f0b2da6ab 100644
--- a/editor/editor_node.cpp
+++ b/editor/editor_node.cpp
@@ -46,11 +46,13 @@
 #include "core/string/print_string.h"
 #include "core/string/translation.h"
 #include "core/version.h"
+#include "core/version_hash.gen.h"
 #include "main/main.h"
 #include "scene/gui/center_container.h"
 #include "scene/gui/control.h"
 #include "scene/gui/dialogs.h"
 #include "scene/gui/file_dialog.h"
+#include "scene/gui/link_button.h"
 #include "scene/gui/menu_button.h"
 #include "scene/gui/panel.h"
 #include "scene/gui/panel_container.h"
@@ -184,6 +186,9 @@
 
 EditorNode *EditorNode::singleton = nullptr;
 
+// The metadata key used to store and retrieve the version text to copy to the clipboard.
+static const String META_TEXT_TO_COPY = "text_to_copy";
+
 void EditorNode::disambiguate_filenames(const Vector<String> p_full_paths, Vector<String> &r_filenames) {
 	// Keep track of a list of "index sets," i.e. sets of indices
 	// within disambiguated_scene_names which contain the same name.
@@ -989,6 +994,10 @@ void EditorNode::_reload_project_settings() {
 void EditorNode::_vp_resized() {
 }
 
+void EditorNode::_version_button_pressed() {
+	DisplayServer::get_singleton()->clipboard_set(version_btn->get_meta(META_TEXT_TO_COPY));
+}
+
 void EditorNode::_node_renamed() {
 	if (get_inspector()) {
 		get_inspector()->update_tree();
@@ -5559,6 +5568,8 @@ void EditorNode::_bind_methods() {
 	ClassDB::bind_method("_screenshot", &EditorNode::_screenshot);
 	ClassDB::bind_method("_save_screenshot", &EditorNode::_save_screenshot);
 
+	ClassDB::bind_method("_version_button_pressed", &EditorNode::_version_button_pressed);
+
 	ADD_SIGNAL(MethodInfo("play_pressed"));
 	ADD_SIGNAL(MethodInfo("pause_pressed"));
 	ADD_SIGNAL(MethodInfo("stop_pressed"));
@@ -6617,11 +6628,31 @@ EditorNode::EditorNode() {
 	bottom_panel_hb_editors->set_h_size_flags(Control::SIZE_EXPAND_FILL);
 	bottom_panel_hb->add_child(bottom_panel_hb_editors);
 
-	version_label = memnew(Label);
-	version_label->set_text(VERSION_FULL_CONFIG);
+	VBoxContainer *version_info_vbc = memnew(VBoxContainer);
+	bottom_panel_hb->add_child(version_info_vbc);
+
+	// Add a dummy control node for vertical spacing.
+	Control *v_spacer = memnew(Control);
+	version_info_vbc->add_child(v_spacer);
+
+	version_btn = memnew(LinkButton);
+	version_btn->set_text(VERSION_FULL_CONFIG);
+	String hash = String(VERSION_HASH);
+	if (hash.length() != 0) {
+		hash = "." + hash.left(9);
+	}
+	// Set the text to copy in metadata as it slightly differs from the button's text.
+	version_btn->set_meta(META_TEXT_TO_COPY, "v" VERSION_FULL_BUILD + hash);
 	// Fade out the version label to be less prominent, but still readable
-	version_label->set_self_modulate(Color(1, 1, 1, 0.6));
-	bottom_panel_hb->add_child(version_label);
+	version_btn->set_self_modulate(Color(1, 1, 1, 0.65));
+	version_btn->set_underline_mode(LinkButton::UNDERLINE_MODE_ON_HOVER);
+	version_btn->set_tooltip(TTR("Click to copy."));
+	version_btn->connect("pressed", callable_mp(this, &EditorNode::_version_button_pressed));
+	version_info_vbc->add_child(version_btn);
+
+	// Add a dummy control node for horizontal spacing.
+	Control *h_spacer = memnew(Control);
+	bottom_panel_hb->add_child(h_spacer);
 
 	bottom_panel_raise = memnew(Button);
 	bottom_panel_raise->set_flat(true);
diff --git a/editor/editor_node.h b/editor/editor_node.h
index 7e16936f5d..d06851cb4f 100644
--- a/editor/editor_node.h
+++ b/editor/editor_node.h
@@ -40,6 +40,7 @@
 #include "editor/inspector_dock.h"
 #include "editor/property_editor.h"
 #include "editor/scene_tree_dock.h"
+#include "scene/gui/link_button.h"
 
 typedef void (*EditorNodeInitCallback)();
 typedef void (*EditorPluginInitializeCallback)();
@@ -424,7 +425,7 @@ private:
 	HBoxContainer *bottom_panel_hb;
 	HBoxContainer *bottom_panel_hb_editors;
 	VBoxContainer *bottom_panel_vb;
-	Label *version_label;
+	LinkButton *version_btn;
 	Button *bottom_panel_raise;
 
 	Tree *disk_changed_list;
@@ -477,6 +478,7 @@ private:
 	void _close_messages();
 	void _show_messages();
 	void _vp_resized();
+	void _version_button_pressed();
 
 	int _save_external_resources();
 
diff --git a/editor/editor_plugin.cpp b/editor/editor_plugin.cpp
index eabcbacd9a..6b96cb0f5c 100644
--- a/editor/editor_plugin.cpp
+++ b/editor/editor_plugin.cpp
@@ -703,6 +703,14 @@ bool EditorPlugin::get_remove_list(List<Node *> *p_list) {
 void EditorPlugin::restore_global_state() {}
 void EditorPlugin::save_global_state() {}
 
+void EditorPlugin::add_undo_redo_inspector_hook_callback(Callable p_callable) {
+	EditorNode::get_singleton()->get_editor_data().add_undo_redo_inspector_hook_callback(p_callable);
+}
+
+void EditorPlugin::remove_undo_redo_inspector_hook_callback(Callable p_callable) {
+	EditorNode::get_singleton()->get_editor_data().remove_undo_redo_inspector_hook_callback(p_callable);
+}
+
 void EditorPlugin::add_translation_parser_plugin(const Ref<EditorTranslationParserPlugin> &p_parser) {
 	EditorTranslationParser::get_singleton()->add_parser(p_parser, EditorTranslationParser::CUSTOM);
 }
@@ -862,6 +870,8 @@ void EditorPlugin::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("hide_bottom_panel"), &EditorPlugin::hide_bottom_panel);
 
 	ClassDB::bind_method(D_METHOD("get_undo_redo"), &EditorPlugin::_get_undo_redo);
+	ClassDB::bind_method(D_METHOD("add_undo_redo_inspector_hook_callback", "callable"), &EditorPlugin::add_undo_redo_inspector_hook_callback);
+	ClassDB::bind_method(D_METHOD("remove_undo_redo_inspector_hook_callback", "callable"), &EditorPlugin::remove_undo_redo_inspector_hook_callback);
 	ClassDB::bind_method(D_METHOD("queue_save_layout"), &EditorPlugin::queue_save_layout);
 	ClassDB::bind_method(D_METHOD("add_translation_parser_plugin", "parser"), &EditorPlugin::add_translation_parser_plugin);
 	ClassDB::bind_method(D_METHOD("remove_translation_parser_plugin", "parser"), &EditorPlugin::remove_translation_parser_plugin);
diff --git a/editor/editor_plugin.h b/editor/editor_plugin.h
index 67b163eabf..37412e5ebe 100644
--- a/editor/editor_plugin.h
+++ b/editor/editor_plugin.h
@@ -225,6 +225,9 @@ public:
 	EditorInterface *get_editor_interface();
 	ScriptCreateDialog *get_script_create_dialog();
 
+	void add_undo_redo_inspector_hook_callback(Callable p_callable);
+	void remove_undo_redo_inspector_hook_callback(Callable p_callable);
+
 	int update_overlays() const;
 
 	void queue_save_layout();
diff --git a/editor/icons/CombineLines.svg b/editor/icons/CombineLines.svg
new file mode 100644
index 0000000000..124814ae88
--- /dev/null
+++ b/editor/icons/CombineLines.svg
@@ -0,0 +1 @@
+<svg height="16" viewBox="0 0 16 16" width="16" xmlns="http://www.w3.org/2000/svg"><path d="M1 2v2h14V2zm7 5v2h7V7zm0 5v2h7v-2zM4.976 14V9h2l-1.5-2-1.5-2-1.5 2-1.5 2h2v5z" fill="#e0e0e0"/></svg>
diff --git a/editor/project_manager.cpp b/editor/project_manager.cpp
index 136ff118f0..2b75144ac7 100644
--- a/editor/project_manager.cpp
+++ b/editor/project_manager.cpp
@@ -2371,6 +2371,7 @@ void ProjectManager::_on_search_term_changed(const String &p_term) {
 void ProjectManager::_bind_methods() {
 	ClassDB::bind_method("_unhandled_key_input", &ProjectManager::_unhandled_key_input);
 	ClassDB::bind_method("_update_project_buttons", &ProjectManager::_update_project_buttons);
+	ClassDB::bind_method("_version_button_pressed", &ProjectManager::_version_button_pressed);
 }
 
 void ProjectManager::_open_asset_library() {
@@ -2378,6 +2379,10 @@ void ProjectManager::_open_asset_library() {
 	tabs->set_current_tab(1);
 }
 
+void ProjectManager::_version_button_pressed() {
+	DisplayServer::get_singleton()->clipboard_set(version_btn->get_text());
+}
+
 ProjectManager::ProjectManager() {
 	// load settings
 	if (!EditorSettings::get_singleton()) {
@@ -2601,15 +2606,30 @@ ProjectManager::ProjectManager() {
 		settings_hb->set_h_grow_direction(Control::GROW_DIRECTION_BEGIN);
 		settings_hb->set_anchors_and_offsets_preset(Control::PRESET_TOP_RIGHT);
 
-		Label *version_label = memnew(Label);
+		// A VBoxContainer that contains a dummy Control node to adjust the LinkButton's vertical position.
+		VBoxContainer *spacer_vb = memnew(VBoxContainer);
+		settings_hb->add_child(spacer_vb);
+
+		Control *v_spacer = memnew(Control);
+		spacer_vb->add_child(v_spacer);
+
+		version_btn = memnew(LinkButton);
 		String hash = String(VERSION_HASH);
 		if (hash.length() != 0) {
 			hash = "." + hash.left(9);
 		}
-		version_label->set_text("v" VERSION_FULL_BUILD "" + hash);
-		version_label->set_self_modulate(Color(1, 1, 1, 0.6));
-		version_label->set_align(Label::ALIGN_CENTER);
-		settings_hb->add_child(version_label);
+		version_btn->set_text("v" VERSION_FULL_BUILD + hash);
+		// Fade the version label to be less prominent, but still readable.
+		version_btn->set_self_modulate(Color(1, 1, 1, 0.6));
+		version_btn->set_underline_mode(LinkButton::UNDERLINE_MODE_ON_HOVER);
+		version_btn->set_tooltip(TTR("Click to copy."));
+		version_btn->connect("pressed", callable_mp(this, &ProjectManager::_version_button_pressed));
+		spacer_vb->add_child(version_btn);
+
+		// Add a small horizontal spacer between the version and language buttons
+		// to distinguish them.
+		Control *h_spacer = memnew(Control);
+		settings_hb->add_child(h_spacer);
 
 		language_btn = memnew(OptionButton);
 		language_btn->set_flat(true);
diff --git a/editor/project_manager.h b/editor/project_manager.h
index a66b7c4ab6..0fc69bd313 100644
--- a/editor/project_manager.h
+++ b/editor/project_manager.h
@@ -89,6 +89,7 @@ class ProjectManager : public Control {
 	ProjectDialog *npdialog;
 
 	OptionButton *language_btn;
+	LinkButton *version_btn;
 
 	void _open_asset_library();
 	void _scan_projects();
@@ -123,6 +124,7 @@ class ProjectManager : public Control {
 	void _unhandled_key_input(const Ref<InputEvent> &p_ev);
 	void _files_dropped(PackedStringArray p_files, int p_screen);
 
+	void _version_button_pressed();
 	void _on_order_option_changed(int p_idx);
 	void _on_tab_changed(int p_tab);
 	void _on_search_term_changed(const String &p_term);
diff --git a/scene/2d/tile_map.cpp b/scene/2d/tile_map.cpp
index 4565543ec3..532a795b7c 100644
--- a/scene/2d/tile_map.cpp
+++ b/scene/2d/tile_map.cpp
@@ -1526,6 +1526,12 @@ Vector2 TileMap::map_to_world(const Vector2 &p_pos, bool p_ignore_ofs) const {
 Vector2 TileMap::world_to_map(const Vector2 &p_pos) const {
 	Vector2 ret = get_cell_transform().affine_inverse().xform(p_pos);
 
+	// Account for precision errors on the border (GH-23250).
+	// 0.00005 is 5*CMP_EPSILON, results would start being unpredictable if
+	// cell size is > 15,000, but we can hardly have more precision anyway with
+	// floating point.
+	ret += Vector2(0.00005, 0.00005);
+
 	switch (half_offset) {
 		case HALF_OFFSET_X: {
 			if (int(floor(ret.y)) & 1) {
@@ -1552,11 +1558,6 @@ Vector2 TileMap::world_to_map(const Vector2 &p_pos) const {
 		}
 	}
 
-	// Account for precision errors on the border (GH-23250).
-	// 0.00005 is 5*CMP_EPSILON, results would start being unpredictable if
-	// cell size is > 15,000, but we can hardly have more precision anyway with
-	// floating point.
-	ret += Vector2(0.00005, 0.00005);
 	return ret.floor();
 }
 
diff --git a/scene/gui/rich_text_label.cpp b/scene/gui/rich_text_label.cpp
index 353eac3ce8..9efc1af23b 100644
--- a/scene/gui/rich_text_label.cpp
+++ b/scene/gui/rich_text_label.cpp
@@ -2612,6 +2612,13 @@ void RichTextLabel::pop() {
 	current = current->parent;
 }
 
+// Creates a new line without adding an ItemNewline to the previous line.
+// Useful when wanting to calling remove_line and add a new line immediately after.
+void RichTextLabel::increment_line_count() {
+	current_frame->lines.resize(current_frame->lines.size() + 1);
+	_invalidate_current_line(current_frame);
+}
+
 void RichTextLabel::clear() {
 	main->_clear_children();
 	current = main;
diff --git a/scene/gui/rich_text_label.h b/scene/gui/rich_text_label.h
index e3e457d1f2..afc88e070a 100644
--- a/scene/gui/rich_text_label.h
+++ b/scene/gui/rich_text_label.h
@@ -483,6 +483,8 @@ public:
 	void push_cell();
 	void pop();
 
+	void increment_line_count();
+
 	void clear();
 
 	void set_offset(int p_pixel);
diff --git a/scene/gui/scroll_container.cpp b/scene/gui/scroll_container.cpp
index 73c6371658..67dcf458b0 100644
--- a/scene/gui/scroll_container.cpp
+++ b/scene/gui/scroll_container.cpp
@@ -299,7 +299,7 @@ void ScrollContainer::_update_dimensions() {
 		child_max_size.x = MAX(child_max_size.x, minsize.x);
 		child_max_size.y = MAX(child_max_size.y, minsize.y);
 
-		Rect2 r = Rect2(-scroll, minsize);
+		Rect2 r = Rect2(-Size2(get_h_scroll(), get_v_scroll()), minsize);
 		if (!scroll_h || (!h_scroll->is_visible_in_tree() && c->get_h_size_flags() & SIZE_EXPAND)) {
 			r.position.x = 0;
 			if (c->get_h_size_flags() & SIZE_EXPAND) {
@@ -434,40 +434,16 @@ void ScrollContainer::update_scrollbars() {
 
 	Size2 min = child_max_size;
 
-	bool hide_scroll_v = !scroll_v || min.height <= size.height;
-	bool hide_scroll_h = !scroll_h || min.width <= size.width;
-
-	v_scroll->set_max(min.height);
-	if (hide_scroll_v) {
-		v_scroll->set_page(size.height);
-		v_scroll->hide();
-		scroll.y = 0;
-	} else {
-		v_scroll->show();
-		if (hide_scroll_h) {
-			v_scroll->set_page(size.height);
-		} else {
-			v_scroll->set_page(size.height - hmin.height);
-		}
-
-		scroll.y = v_scroll->get_value();
-	}
+	bool hide_scroll_h = !scroll_h || min.width <= size.width || !h_scroll_visible;
+	bool hide_scroll_v = !scroll_v || min.height <= size.height || !v_scroll_visible;
 
 	h_scroll->set_max(min.width);
-	if (hide_scroll_h) {
-		h_scroll->set_page(size.width);
-		h_scroll->hide();
-		scroll.x = 0;
-	} else {
-		h_scroll->show();
-		if (hide_scroll_v) {
-			h_scroll->set_page(size.width);
-		} else {
-			h_scroll->set_page(size.width - vmin.width);
-		}
+	h_scroll->set_page(size.width - (hide_scroll_v ? 0 : vmin.width));
+	h_scroll->set_visible(!hide_scroll_h);
 
-		scroll.x = h_scroll->get_value();
-	}
+	v_scroll->set_max(min.height);
+	v_scroll->set_page(size.height - (hide_scroll_h ? 0 : hmin.height));
+	v_scroll->set_visible(!hide_scroll_v);
 
 	// Avoid scrollbar overlapping.
 	h_scroll->set_anchor_and_offset(SIDE_RIGHT, ANCHOR_END, hide_scroll_v ? 0 : -vmin.width);
@@ -475,13 +451,28 @@ void ScrollContainer::update_scrollbars() {
 }
 
 void ScrollContainer::_scroll_moved(float) {
-	scroll.x = h_scroll->get_value();
-	scroll.y = v_scroll->get_value();
 	queue_sort();
-
 	update();
 };
 
+void ScrollContainer::set_h_scroll(int p_pos) {
+	h_scroll->set_value(p_pos);
+	_cancel_drag();
+}
+
+int ScrollContainer::get_h_scroll() const {
+	return h_scroll->get_value();
+}
+
+void ScrollContainer::set_v_scroll(int p_pos) {
+	v_scroll->set_value(p_pos);
+	_cancel_drag();
+}
+
+int ScrollContainer::get_v_scroll() const {
+	return v_scroll->get_value();
+}
+
 void ScrollContainer::set_enable_h_scroll(bool p_enable) {
 	if (scroll_h == p_enable) {
 		return;
@@ -510,22 +501,30 @@ bool ScrollContainer::is_v_scroll_enabled() const {
 	return scroll_v;
 }
 
-int ScrollContainer::get_v_scroll() const {
-	return v_scroll->get_value();
+void ScrollContainer::set_h_scroll_visible(bool p_visible) {
+	if (h_scroll_visible == p_visible) {
+		return;
+	}
+
+	h_scroll_visible = p_visible;
+	update_scrollbars();
 }
 
-void ScrollContainer::set_v_scroll(int p_pos) {
-	v_scroll->set_value(p_pos);
-	_cancel_drag();
+bool ScrollContainer::is_h_scroll_visible() const {
+	return h_scroll_visible;
 }
 
-int ScrollContainer::get_h_scroll() const {
-	return h_scroll->get_value();
+void ScrollContainer::set_v_scroll_visible(bool p_visible) {
+	if (v_scroll_visible == p_visible) {
+		return;
+	}
+
+	v_scroll_visible = p_visible;
+	update_scrollbars();
 }
 
-void ScrollContainer::set_h_scroll(int p_pos) {
-	h_scroll->set_value(p_pos);
-	_cancel_drag();
+bool ScrollContainer::is_v_scroll_visible() const {
+	return v_scroll_visible;
 }
 
 int ScrollContainer::get_deadzone() const {
@@ -581,17 +580,29 @@ VScrollBar *ScrollContainer::get_v_scrollbar() {
 
 void ScrollContainer::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("_gui_input"), &ScrollContainer::_gui_input);
-	ClassDB::bind_method(D_METHOD("set_enable_h_scroll", "enable"), &ScrollContainer::set_enable_h_scroll);
-	ClassDB::bind_method(D_METHOD("is_h_scroll_enabled"), &ScrollContainer::is_h_scroll_enabled);
-	ClassDB::bind_method(D_METHOD("set_enable_v_scroll", "enable"), &ScrollContainer::set_enable_v_scroll);
-	ClassDB::bind_method(D_METHOD("is_v_scroll_enabled"), &ScrollContainer::is_v_scroll_enabled);
 	ClassDB::bind_method(D_METHOD("_update_scrollbar_position"), &ScrollContainer::_update_scrollbar_position);
+
 	ClassDB::bind_method(D_METHOD("set_h_scroll", "value"), &ScrollContainer::set_h_scroll);
 	ClassDB::bind_method(D_METHOD("get_h_scroll"), &ScrollContainer::get_h_scroll);
+
 	ClassDB::bind_method(D_METHOD("set_v_scroll", "value"), &ScrollContainer::set_v_scroll);
 	ClassDB::bind_method(D_METHOD("get_v_scroll"), &ScrollContainer::get_v_scroll);
+
+	ClassDB::bind_method(D_METHOD("set_enable_h_scroll", "enable"), &ScrollContainer::set_enable_h_scroll);
+	ClassDB::bind_method(D_METHOD("is_h_scroll_enabled"), &ScrollContainer::is_h_scroll_enabled);
+
+	ClassDB::bind_method(D_METHOD("set_enable_v_scroll", "enable"), &ScrollContainer::set_enable_v_scroll);
+	ClassDB::bind_method(D_METHOD("is_v_scroll_enabled"), &ScrollContainer::is_v_scroll_enabled);
+
+	ClassDB::bind_method(D_METHOD("set_h_scroll_visible", "visible"), &ScrollContainer::set_h_scroll_visible);
+	ClassDB::bind_method(D_METHOD("is_h_scroll_visible"), &ScrollContainer::is_h_scroll_visible);
+
+	ClassDB::bind_method(D_METHOD("set_v_scroll_visible", "visible"), &ScrollContainer::set_v_scroll_visible);
+	ClassDB::bind_method(D_METHOD("is_v_scroll_visible"), &ScrollContainer::is_v_scroll_visible);
+
 	ClassDB::bind_method(D_METHOD("set_deadzone", "deadzone"), &ScrollContainer::set_deadzone);
 	ClassDB::bind_method(D_METHOD("get_deadzone"), &ScrollContainer::get_deadzone);
+
 	ClassDB::bind_method(D_METHOD("set_follow_focus", "enabled"), &ScrollContainer::set_follow_focus);
 	ClassDB::bind_method(D_METHOD("is_following_focus"), &ScrollContainer::is_following_focus);
 
@@ -604,10 +615,12 @@ void ScrollContainer::_bind_methods() {
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "follow_focus"), "set_follow_focus", "is_following_focus");
 
 	ADD_GROUP("Scroll", "scroll_");
-	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_horizontal_enabled"), "set_enable_h_scroll", "is_h_scroll_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "scroll_horizontal"), "set_h_scroll", "get_h_scroll");
-	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_vertical_enabled"), "set_enable_v_scroll", "is_v_scroll_enabled");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "scroll_vertical"), "set_v_scroll", "get_v_scroll");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_horizontal_enabled"), "set_enable_h_scroll", "is_h_scroll_enabled");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_vertical_enabled"), "set_enable_v_scroll", "is_v_scroll_enabled");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_horizontal_visible"), "set_h_scroll_visible", "is_h_scroll_visible");
+	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "scroll_vertical_visible"), "set_v_scroll_visible", "is_v_scroll_visible");
 	ADD_PROPERTY(PropertyInfo(Variant::INT, "scroll_deadzone"), "set_deadzone", "get_deadzone");
 
 	GLOBAL_DEF("gui/common/default_scroll_deadzone", 0);
diff --git a/scene/gui/scroll_container.h b/scene/gui/scroll_container.h
index e7d73bab0a..f61df70b85 100644
--- a/scene/gui/scroll_container.h
+++ b/scene/gui/scroll_container.h
@@ -42,7 +42,6 @@ class ScrollContainer : public Container {
 	VScrollBar *v_scroll;
 
 	Size2 child_max_size;
-	Size2 scroll;
 
 	void update_scrollbars();
 
@@ -50,16 +49,17 @@ class ScrollContainer : public Container {
 	Vector2 drag_accum;
 	Vector2 drag_from;
 	Vector2 last_drag_accum;
-	float last_drag_time = 0.0;
-	float time_since_motion = 0.0;
+	float time_since_motion = 0.0f;
 	bool drag_touching = false;
 	bool drag_touching_deaccel = false;
-	bool click_handled = false;
 	bool beyond_deadzone = false;
 
 	bool scroll_h = true;
 	bool scroll_v = true;
 
+	bool h_scroll_visible = true;
+	bool v_scroll_visible = true;
+
 	int deadzone = 0;
 	bool follow_focus = false;
 
@@ -80,11 +80,11 @@ protected:
 	void _ensure_focused_visible(Control *p_node);
 
 public:
-	int get_v_scroll() const;
-	void set_v_scroll(int p_pos);
-
-	int get_h_scroll() const;
 	void set_h_scroll(int p_pos);
+	int get_h_scroll() const;
+
+	void set_v_scroll(int p_pos);
+	int get_v_scroll() const;
 
 	void set_enable_h_scroll(bool p_enable);
 	bool is_h_scroll_enabled() const;
@@ -92,6 +92,12 @@ public:
 	void set_enable_v_scroll(bool p_enable);
 	bool is_v_scroll_enabled() const;
 
+	void set_h_scroll_visible(bool p_visible);
+	bool is_h_scroll_visible() const;
+
+	void set_v_scroll_visible(bool p_visible);
+	bool is_v_scroll_visible() const;
+
 	int get_deadzone() const;
 	void set_deadzone(int p_deadzone);
 
diff --git a/scene/gui/tree.cpp b/scene/gui/tree.cpp
index 85a3d7148a..6404f6fc0d 100644
--- a/scene/gui/tree.cpp
+++ b/scene/gui/tree.cpp
@@ -1388,7 +1388,7 @@ int Tree::draw_item(const Point2i &p_pos, const Point2 &p_draw_ofs, const Size2
 				}
 			}
 
-			if ((select_mode == SELECT_ROW && selected_item == p_item) || p_item->cells[i].selected) {
+			if ((select_mode == SELECT_ROW && selected_item == p_item) || p_item->cells[i].selected || !p_item->has_meta("__focus_rect")) {
 				Rect2i r(cell_rect.position, cell_rect.size);
 
 				p_item->set_meta("__focus_rect", Rect2(r.position, r.size));
diff --git a/scene/resources/physics_material.cpp b/scene/resources/physics_material.cpp
index d65b0c8927..31df35aa51 100644
--- a/scene/resources/physics_material.cpp
+++ b/scene/resources/physics_material.cpp
@@ -43,9 +43,9 @@ void PhysicsMaterial::_bind_methods() {
 	ClassDB::bind_method(D_METHOD("set_absorbent", "absorbent"), &PhysicsMaterial::set_absorbent);
 	ClassDB::bind_method(D_METHOD("is_absorbent"), &PhysicsMaterial::is_absorbent);
 
-	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "friction", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_friction", "get_friction");
+	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "friction", PROPERTY_HINT_RANGE, "0,1,0.01,or_greater"), "set_friction", "get_friction");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "rough"), "set_rough", "is_rough");
-	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "bounce", PROPERTY_HINT_RANGE, "0,1,0.01"), "set_bounce", "get_bounce");
+	ADD_PROPERTY(PropertyInfo(Variant::FLOAT, "bounce", PROPERTY_HINT_RANGE, "0,1,0.01,or_greater"), "set_bounce", "get_bounce");
 	ADD_PROPERTY(PropertyInfo(Variant::BOOL, "absorbent"), "set_absorbent", "is_absorbent");
 }