### 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
GDCLASS(AnimationTimelineEdit, Range);
	Ref<Animation> animation;
	bool read_only = false;
	AnimationTrackEdit *track_edit = nullptr;
	int name_limit = 0;
	Range *zoom = nullptr;
	Range *h_scroll = nullptr;
	float play_position_pos = 0.0f;
	HBoxContainer *len_hb = nullptr;
	EditorSpinSlider *length = nullptr;
	Button *loop = nullptr;
	TextureRect *time_icon = nullptr;
	MenuButton *add_track = nullptr;
	Control *play_position = nullptr; 
	HScrollBar *hscroll = nullptr;
	void _zoom_changed(double);
	void _anim_length_changed(double p_new_len);
	void _anim_loop_pressed();
	void _play_position_draw();
	Rect2 hsize_rect;
	bool editing = false;
	bool use_fps = false;
	Ref<ViewPanner> panner;
	void _pan_callback(Vector2 p_scroll_vec, Ref<InputEvent> p_event);