### 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
undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				float prev = animation->audio_track_get_key_end_offset(track, key);
				undo_redo->add_do_method(animation.ptr(), "audio_track_set_key_end_offset", track, key, value);
				undo_redo->add_undo_method(animation.ptr(), "audio_track_set_key_end_offset", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();
				setting = false;
				return true;
			}
		} break;
		case Animation::TYPE_ANIMATION: {
			if (name == "animation") {
				StringName anim_name = p_value;
				setting = true;
				undo_redo->create_action(TTR("Animation Change Keyframe Value"), UndoRedo::MERGE_ENDS);
				StringName prev = animation->animation_track_get_key_animation(track, key);
				undo_redo->add_do_method(animation.ptr(), "animation_track_set_key_animation", track, key, anim_name);
				undo_redo->add_undo_method(animation.ptr(), "animation_track_set_key_animation", track, key, prev);
				undo_redo->add_do_method(this, "_update_obj", animation);
				undo_redo->add_undo_method(this, "_update_obj", animation);
				undo_redo->commit_action();
				setting = false;
				return true;
			}
		} break;
	}
	return false;
}
bool AnimationTrackKeyEdit::_get(const StringName &p_name, Variant &r_ret) const {