### 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
box_selection->set_mouse_filter(MOUSE_FILTER_IGNORE);
	box_selection->hide();
	box_selection->connect("draw", callable_mp(this, &AnimationTrackEditor::_box_selection_draw));
	
	Ref<AnimationTrackEditDefaultPlugin> def_plugin;
	def_plugin.instantiate();
	add_track_edit_plugin(def_plugin);
	
	optimize_dialog = memnew(ConfirmationDialog);
	add_child(optimize_dialog);
	optimize_dialog->set_title(TTR("Animation Optimizer"));
	VBoxContainer *optimize_vb = memnew(VBoxContainer);
	optimize_dialog->add_child(optimize_vb);
	optimize_velocity_error = memnew(SpinBox);
	optimize_velocity_error->set_max(1.0);
	optimize_velocity_error->set_min(0.001);
	optimize_velocity_error->set_step(0.001);
	optimize_velocity_error->set_value(0.01);
	optimize_vb->add_margin_child(TTR("Max Velocity Error:"), optimize_velocity_error);
	optimize_angular_error = memnew(SpinBox);
	optimize_angular_error->set_max(1.0);
	optimize_angular_error->set_min(0.001);
	optimize_angular_error->set_step(0.001);
	optimize_angular_error->set_value(0.01);
	optimize_vb->add_margin_child(TTR("Max Angular Error:"), optimize_angular_error);
	optimize_precision_error = memnew(SpinBox);
	optimize_precision_error->set_max(6);
	optimize_precision_error->set_min(1);
	optimize_precision_error->set_step(1);
	optimize_precision_error->set_value(3);