### 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
main_panel = memnew(PanelContainer);
	main_panel->set_focus_mode(FOCUS_ALL); 
	add_child(main_panel);
	main_panel->set_v_size_flags(SIZE_EXPAND_FILL);
	HBoxContainer *timeline_scroll = memnew(HBoxContainer);
	main_panel->add_child(timeline_scroll);
	timeline_scroll->set_v_size_flags(SIZE_EXPAND_FILL);
	VBoxContainer *timeline_vbox = memnew(VBoxContainer);
	timeline_scroll->add_child(timeline_vbox);
	timeline_vbox->set_v_size_flags(SIZE_EXPAND_FILL);
	timeline_vbox->set_h_size_flags(SIZE_EXPAND_FILL);
	timeline_vbox->add_theme_constant_override("separation", 0);
	info_message = memnew(Label);
	info_message->set_text(TTR("Select an AnimationPlayer node to create and edit animations."));
	info_message->set_vertical_alignment(VERTICAL_ALIGNMENT_CENTER);
	info_message->set_horizontal_alignment(HORIZONTAL_ALIGNMENT_CENTER);
	info_message->set_autowrap_mode(TextServer::AUTOWRAP_WORD_SMART);