Add macOS DisplayServer implementation.

Change global menu to use Callable, add support for check items and submenus.

core/os/main_loop.cpp

@@ -44,8 +44,6 @@ void MainLoop::_bind_methods() {
 	BIND_VMETHOD(MethodInfo(Variant::BOOL, "_idle", PropertyInfo(Variant::FLOAT, "delta")));
 	BIND_VMETHOD(MethodInfo("_finalize"));
 
-	BIND_VMETHOD(MethodInfo("_global_menu_action", PropertyInfo(Variant::NIL, "id"), PropertyInfo(Variant::NIL, "meta")));
-
 	BIND_CONSTANT(NOTIFICATION_OS_MEMORY_WARNING);
 	BIND_CONSTANT(NOTIFICATION_TRANSLATION_CHANGED);
 	BIND_CONSTANT(NOTIFICATION_WM_ABOUT);
@@ -91,12 +89,6 @@ bool MainLoop::idle(float p_time) {
 	return false;
 }
 
-void MainLoop::global_menu_action(const Variant &p_id, const Variant &p_meta) {
-
-	if (get_script_instance())
-		get_script_instance()->call("_global_menu_action", p_id, p_meta);
-}
-
 void MainLoop::finish() {
 
 	if (get_script_instance()) {

core/os/main_loop.h

@@ -62,8 +62,6 @@ public:
 	virtual bool idle(float p_time);
 	virtual void finish();
 
-	virtual void global_menu_action(const Variant &p_id, const Variant &p_meta);
-
 	void set_init_script(const Ref<Script> &p_init_script);
 
 	MainLoop();

core/os/os.h

@@ -146,6 +146,9 @@ public:
 	virtual List<String> get_cmdline_args() const { return _cmdline; }
 	virtual String get_model_name() const;
 
+	bool is_layered_allowed() const { return _allow_layered; }
+	bool is_hidpi_allowed() const { return _allow_hidpi; }
+
 	void ensure_user_data_dir();
 
 	virtual MainLoop *get_main_loop() const = 0;
@@ -286,7 +289,6 @@ public:
 	virtual bool request_permissions() { return true; }
 	virtual Vector<String> get_granted_permissions() const { return Vector<String>(); }
 
-	bool is_hidpi_allowed() const { return _allow_hidpi; }
 	virtual void process_and_drop_events() {}
 	OS();
 	virtual ~OS();