### Godot version

4.0.dev(2fdaf2919c03ab50f971f2d51616d4ee329d29af)

### System information

any

### Issue description

AnimationPlayer is unintentionally hidden.

https://user-images.githubusercontent.com/61938263/217088704-c1ad44d6-ef7b-4b10-b351-f9f9fa166e39.mp4


### Steps to reproduce

Select AnimationTree -> Select AnimationPlayer

### Minimal reproduction project

N/A
ml = Ref<MeshLibrary>(memnew(MeshLibrary));
			}
			MeshLibraryEditor::update_library_file(editor_data.get_edited_scene_root(), ml, true, file_export_lib_apply_xforms->is_pressed());
			Error err = ResourceSaver::save(ml, p_file);
			if (err) {
				show_accept(TTR("Error saving MeshLibrary!"), TTR("OK"));
				return;
			}
		} break;
		case RESOURCE_SAVE:
		case RESOURCE_SAVE_AS: {
			ERR_FAIL_COND(saving_resource.is_null());
			save_resource_in_path(saving_resource, p_file);
			saving_resource = Ref<Resource>();
			ObjectID current_id = editor_history.get_current();
			Object *current_obj = current_id.is_valid() ? ObjectDB::get_instance(current_id) : nullptr;
			ERR_FAIL_COND(!current_obj);
			current_obj->notify_property_list_changed();
		} break;
		case SETTINGS_LAYOUT_SAVE: {
			if (p_file.is_empty()) {
				return;
			}
			Ref<ConfigFile> config;
			config.instantiate();
			Error err = config->load(EditorSettings::get_singleton()->get_editor_layouts_config());
			if (err == ERR_FILE_CANT_OPEN || err == ERR_FILE_NOT_FOUND) {
				config.instantiate();
			} else if (err != OK) {
				show_warning(TTR("An error occurred while trying to save the editor layout.\nMake sure the editor's user data path is writable."));