### 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
double current_zoom_value = timeline->get_zoom()->get_value();
	timeline->get_zoom()->set_value(MAX(0.01, current_zoom_value * p_zoom_factor));
}
void AnimationTrackEditor::_cancel_bezier_edit() {
	bezier_edit->hide();
	scroll->show();
	bezier_edit_icon->set_pressed(false);
}
void AnimationTrackEditor::_bezier_edit(int p_for_track) {
	_clear_selection(); 
	bezier_edit->set_root(root);
	bezier_edit->set_animation_and_track(animation, p_for_track, read_only);
	scroll->hide();
	bezier_edit->show();
	
}
void AnimationTrackEditor::_bezier_track_set_key_handle_mode(Animation *p_anim, int p_track, int p_index, Animation::HandleMode p_mode, Animation::HandleSetMode p_set_mode) {
	if (!p_anim) {
		return;
	}
	p_anim->bezier_track_set_key_handle_mode(p_track, p_index, p_mode, p_set_mode);
}
void AnimationTrackEditor::_anim_duplicate_keys(bool transpose) {