### 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
prev_scene->set_flat(true);
	prev_scene->set_icon(gui_base->get_theme_icon(SNAME("PrevScene"), SNAME("EditorIcons")));
	prev_scene->set_tooltip_text(TTR("Go to previously opened scene."));
	prev_scene->set_disabled(true);
	prev_scene->connect("pressed", callable_mp(this, &EditorNode::_menu_option).bind(FILE_OPEN_PREV));
	gui_base->add_child(prev_scene);
	prev_scene->set_position(Point2(3, 24));
	prev_scene->hide();
	accept = memnew(AcceptDialog);
	gui_base->add_child(accept);
	accept->connect("confirmed", callable_mp(this, &EditorNode::_menu_confirm_current));
	save_accept = memnew(AcceptDialog);
	gui_base->add_child(save_accept);
	save_accept->connect("confirmed", callable_mp(this, &EditorNode::_menu_option).bind((int)MenuOptions::FILE_SAVE_AS_SCENE));
	project_export = memnew(ProjectExportDialog);
	gui_base->add_child(project_export);
	dependency_error = memnew(DependencyErrorDialog);
	gui_base->add_child(dependency_error);
	dependency_fixer = memnew(DependencyEditor);
	gui_base->add_child(dependency_fixer);
	editor_settings_dialog = memnew(EditorSettingsDialog);
	gui_base->add_child(editor_settings_dialog);
	project_settings_editor = memnew(ProjectSettingsEditor(&editor_data));
	gui_base->add_child(project_settings_editor);
	scene_import_settings = memnew(SceneImportSettings);
	gui_base->add_child(scene_import_settings);
	audio_stream_import_settings = memnew(AudioStreamImportSettings);
	gui_base->add_child(audio_stream_import_settings);
	fontdata_import_settings = memnew(DynamicFontImportSettings);
	gui_base->add_child(fontdata_import_settings);