### Godot version

4.0.stable

### System information

Windows 10, Forward+, GTX 1070 driver 528.49

### Issue description

When trying to edit the handle mode of a bezier cruve key from the inspector tab, the mode doesn't change. It works fine when right clicking on the key and setting the handle mode from here though. 

https://user-images.githubusercontent.com/24484962/222379540-29d71b6d-ff0c-4a21-9905-9750d0581fda.mp4



### Steps to reproduce

On an animation track using a bezier curve, select a key and try to change the handle mode from the inspector tab

### Minimal reproduction project

N/A
if (dragging_hsize || hsize_rect.has_point(p_pos)) {
		
		return Control::CURSOR_HSIZE;
	} else {
		return get_default_cursor_shape();
	}
}
void AnimationTimelineEdit::_pan_callback(Vector2 p_scroll_vec, Ref<InputEvent> p_event) {
	set_value(get_value() - p_scroll_vec.x / get_zoom_scale());
}
void AnimationTimelineEdit::_zoom_callback(float p_zoom_factor, Vector2 p_origin, Ref<InputEvent> p_event) {
	double current_zoom_value = get_zoom()->get_value();
	get_zoom()->set_value(MAX(0.01, current_zoom_value * p_zoom_factor));
}
void AnimationTimelineEdit::set_use_fps(bool p_use_fps) {
	use_fps = p_use_fps;
	queue_redraw();
}
bool AnimationTimelineEdit::is_using_fps() const {
	return use_fps;
}
void AnimationTimelineEdit::set_hscroll(HScrollBar *p_hscroll) {