Fix scene not updated when editing animation track key value in AnimationTrackKeyEdit Inspector panel

[ChrisBase]

• Fixes: Scene not updated when editing animation track key value in AnimationTrackKeyEdit Inspector panel #78131

Test environment

Godot Engine v4.3.rc1.official
Windows 11 Pro, Version 23H2, Build 22631.3880

Issue

Modifications to properties related to AnimationTrackKeyEdit instances do not request the animation player to update.

Fix

This fix modifies the AnimationTrackEditor::_animation_changed() method to call the AnimationPlayer::advance() method of the animation player with a zero offset. That forces the animation player to udate and the UI to refresh.

[AThousandShips]

Also please update your commit title (with git commit --amend) to be descriptive of what the PR does, the title of this PR would be appropriate (in the future, please don't reference issues in the title of a commit, see here

[ChrisBase]

The previous fix updated AnimationTrackKeyEdit::_update_obj() instead of AnimationTrackEditor::_animation_changed() to call the AnimationPlayer::advance(), but that would not work for animation changes by undo/redo actions.
Now AnimationPlayer::advance() is called in AnimationTrackEditor::_animation_changed() which works for all cases.
The pull request description is updated accordingly.

[TokageItLab]

Since a more correct implementation is already in the pre-merge stage as #91599, I suggest closing this PR and giving priority to that one. If you find something missing in that PR, please comment there.

[ChrisBase]

Since a more correct implementation is already in the pre-merge stage as #91599, I suggest closing this PR and giving priority to that one. If you find something missing in that PR, please comment there.

I tested #91599 and i can confirm that it fixes #78131.