### 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
if (animation != p_anim) {
		return;
	}
	_clear_selection();
}
void AnimationTrackEditor::_select_at_anim(const Ref<Animation> &p_anim, int p_track, float p_pos) {
	if (animation != p_anim) {
		return;
	}
	int idx = animation->track_find_key(p_track, p_pos, Animation::FIND_MODE_APPROX);
	ERR_FAIL_COND(idx < 0);
	SelectedKey sk;
	sk.track = p_track;
	sk.key = idx;
	KeyInfo ki;
	ki.pos = p_pos;
	selection.insert(sk, ki);
	_update_key_edit();
}
void AnimationTrackEditor::_move_selection_commit() {