optimize mac again

Yuhang Zhao

2023-12-18 326b23bf678301a72cb9d67ac64347dd5ce49a37

 src/widgets/widgetwindowagent_p.h

@@ -16,6 +16,10 @@

        // Host
        QWidget *hostWidget{};
#ifdef Q_OS_MAC
        QWidget *systemButtonAreaWidget{};
        std::unique_ptr<QObject> systemButtonAreaWidgetEventFilter;
#endif

#ifdef Q_OS_WINDOWS
        void setupWindows10BorderWorkaround();