### 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
bool update_obj = false;
	bool change_notify_deserved = false;
	for (const KeyValue<int, List<float>> &E : key_ofs_map) {
		int track = E.key;
		for (const float &key_ofs : E.value) {
			int key = animation->track_find_key(track, key_ofs, Animation::FIND_MODE_APPROX);
			ERR_FAIL_COND_V(key == -1, false);
			String name = p_name;
			if (name == "easing") {
				float val = p_value;
				float prev_val = animation->track_get_key_transition(track, key);
				EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
				if (!setting) {
					setting = true;
					undo_redo->create_action(TTR("Animation Multi Change Transition"), UndoRedo::MERGE_ENDS);
				}