port sync dwm code

Yuhang Zhao

2023-12-07 e1cbc7a1f19a97c7c00ba32df17b30d4cf32c630

 src/quick/quickwindowagent_p.h

@@ -14,8 +14,10 @@

        void init();

        AbstractWindowContext * createContext() const override;

        // Host
        QQuickWindow *host{};
        QQuickWindow *hostWindow{};
    };

}