Fix position of Tooltips

CanvasItem::get_screen_transform returns a transform from the CanvasItem
to the coordinate system, where a Popup - created as a child of the
CanvasItem - should be opened.
get_screen_transform makes some simplifications, that work well, when used
in the editor, but not in general cases.

Since Popups like Tooltips are now used more commonly in projects,
it becomes necessary to correct these simplifications.

This solution introduces Viewport::get_popup_base_transform, which makes
the necessary calculations.

0 files changed, 0 insertions, 0 deletions