port sync dwm code

Yuhang Zhao

2023-12-07 e1cbc7a1f19a97c7c00ba32df17b30d4cf32c630

 src/widgets/widgetwindowagent_p.h

@@ -14,6 +14,8 @@

        void init();

        AbstractWindowContext * createContext() const override;

        // Host
        QWidget *hostWidget{};
    };