Export: Properly reload preset when opening dialog

Fixes #20119 where newly installed templates were not detected.

Also fix a bug with preset deletion where it would attempt to
edit an already removed preset. For this I made it so that
ItemList::deselect_all() also resets `current` to -1, as a manual
ItemList::deselect(idx) already does.

1 files changed, 1 insertions, 1 deletions

diff --git a/scene/gui/item_list.cpp b/scene/gui/item_list.cpp
index 72ed0e9b81..aa52739b0a 100644
--- a/scene/gui/item_list.cpp
+++ b/scene/gui/item_list.cpp
@@ -285,7 +285,7 @@ void ItemList::unselect_all() {
 
 		items[i].selected = false;
 	}
-
+	current = -1;
 	update();
 }