### Godot version

4.0.rc

### System information

Any

### Issue description

If the RESET animation is generated at the same time as the Bezier track is generated, the bezier edit button will not be active.

![image](https://user-images.githubusercontent.com/61938263/218256176-88b1b196-7b6b-4404-84ad-e8694f23bb1b.png)

Also, if you delete a track in the Bezier Editor, or in undo redo, it will not update correctly.

### Steps to reproduce

![image](https://user-images.githubusercontent.com/61938263/218256230-4b0219d5-87e4-453a-8294-59f8feb0cfd5.png)


### Minimal reproduction project

N/A
ERR_FAIL_INDEX(p_track, animation->get_track_count());
	ERR_FAIL_INDEX(p_key, animation->track_get_key_count(p_track));
	SelectedKey sk;
	sk.key = p_key;
	sk.track = p_track;
	selection.erase(sk);
	_redraw_tracks();
	_update_key_edit();
}
void AnimationTrackEditor::_move_selection_begin() {
	moving_selection = true;
	moving_selection_offset = 0;
}
void AnimationTrackEditor::_move_selection(float p_offset) {
	moving_selection_offset = p_offset;
	_redraw_tracks();
}
struct _AnimMoveRestore {
	int track = 0;
	float time = 0;
	Variant key;
	float transition = 0;
};
void AnimationTrackEditor::_clear_key_edit() {