### 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
_redraw_tracks();
	_redraw_groups();
}
void AnimationTrackEditor::_update_step(double p_new_step) {
	if (animation.is_null()) {
		return;
	}
	EditorUndoRedoManager *undo_redo = EditorUndoRedoManager::get_singleton();
	undo_redo->create_action(TTR("Change Animation Step"));
	float step_value = p_new_step;
	if (timeline->is_using_fps()) {
		if (step_value != 0.0) {
			step_value = 1.0 / step_value;
		}
		timeline->queue_redraw();
	}
	undo_redo->add_do_method(animation.ptr(), "set_step", step_value);
	undo_redo->add_undo_method(animation.ptr(), "set_step", animation->get_step());
	step->set_block_signals(true);
	undo_redo->commit_action();
	step->set_block_signals(false);
	emit_signal(SNAME("animation_step_changed"), step_value);
}
void AnimationTrackEditor::_update_length(double p_new_len) {