### 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
optimize_vb->add_margin_child(TTR("Max Precision Error:"), optimize_precision_error);
	optimize_dialog->set_ok_button_text(TTR("Optimize"));
	optimize_dialog->connect("confirmed", callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_OPTIMIZE_ANIMATION_CONFIRM));
	
	cleanup_dialog = memnew(ConfirmationDialog);
	add_child(cleanup_dialog);
	VBoxContainer *cleanup_vb = memnew(VBoxContainer);
	cleanup_dialog->add_child(cleanup_vb);
	cleanup_keys = memnew(CheckBox);
	cleanup_keys->set_text(TTR("Remove invalid keys"));
	cleanup_keys->set_pressed(true);
	cleanup_vb->add_child(cleanup_keys);
	cleanup_tracks = memnew(CheckBox);
	cleanup_tracks->set_text(TTR("Remove unresolved and empty tracks"));
	cleanup_tracks->set_pressed(true);
	cleanup_vb->add_child(cleanup_tracks);
	cleanup_all = memnew(CheckBox);
	cleanup_all->set_text(TTR("Clean-up all animations"));
	cleanup_vb->add_child(cleanup_all);
	cleanup_dialog->set_title(TTR("Clean-Up Animation(s) (NO UNDO!)"));
	cleanup_dialog->set_ok_button_text(TTR("Clean-Up"));
	cleanup_dialog->connect("confirmed", callable_mp(this, &AnimationTrackEditor::_edit_menu_pressed).bind(EDIT_CLEAN_UP_ANIMATION_CONFIRM));
	
	scale_dialog = memnew(ConfirmationDialog);
	VBoxContainer *vbc = memnew(VBoxContainer);
	scale_dialog->add_child(vbc);
	scale = memnew(SpinBox);
	scale->set_min(-99999);
	scale->set_max(99999);
	scale->set_step(0.001);