### Godot version

master

### System information

Godot v4.2.beta (0ea75d77c) - Windows 10.0.22621 - Vulkan (Forward+) - dedicated NVIDIA GeForce RTX 2070 (NVIDIA; 31.0.15.3598) - Intel(R) Core(TM) i7-10750H CPU @ 2.60GHz (12 Threads)

### Issue description

When any of the Import, Filesystem, Node, or History docks are floating, changing an editor feature crashes the engine.
Changing any setting or selecting a different profile triggers it.

This is because `EditorNode::_feature_profile_changed` assumes the docks are in a `TabContainer`, and if they are floating they aren't in one.


### Steps to reproduce

Make any of these docks floating: Import, Filesystem, Node, or History
Open Editor Features (Editor -> Manage Editor Features...)
Make a profile (if you have none) or change a setting on the existing profile

### Minimal reproduction project

n/a
String _get_system_info() const;
	static void _dependency_error_report(const String &p_path, const String &p_dep, const String &p_type) {
		DEV_ASSERT(Thread::get_caller_id() == Thread::get_main_id());
		if (!singleton->dependency_errors.has(p_path)) {
			singleton->dependency_errors[p_path] = HashSet<String>();
		}
		singleton->dependency_errors[p_path].insert(p_dep + "::" + p_type);
	}
	static Ref<Texture2D> _file_dialog_get_icon(const String &p_path);
	static void _file_dialog_register(FileDialog *p_dialog);
	static void _file_dialog_unregister(FileDialog *p_dialog);
	static void _editor_file_dialog_register(EditorFileDialog *p_dialog);
	static void _editor_file_dialog_unregister(EditorFileDialog *p_dialog);
	static void _file_access_close_error_notify(const String &p_str);
	static void _file_access_close_error_notify_impl(const String &p_str);
	static void _print_handler(void *p_this, const String &p_string, bool p_error, bool p_rich);
	static void _print_handler_impl(const String &p_string, bool p_error, bool p_rich);
	static void _resource_saved(Ref<Resource> p_resource, const String &p_path);
	static void _resource_loaded(Ref<Resource> p_resource, const String &p_path);
	void _update_theme(bool p_skip_creation = false);
	void _build_icon_type_cache();
	void _enable_pending_addons();
	void _dialog_action(String p_file);
	void _edit_current(bool p_skip_foreign = false);
	void _dialog_display_save_error(String p_file, Error p_error);
	void _dialog_display_load_error(String p_file, Error p_error);
	void _menu_option(int p_option);
	void _menu_confirm_current();
	void _menu_option_confirm(int p_option, bool p_confirmed);
	void _android_build_source_selected(const String &p_file);