Totally fix top border issue on Win10 for QtWidgets

Sine Striker

2023-12-26 6b2d31247dc2c2804e571b31a71c8a423c1db9d4

 src/widgets/widgetwindowagent_p.h

@@ -34,6 +34,7 @@

#if defined(Q_OS_WINDOWS) && QWINDOWKIT_CONFIG(ENABLE_WINDOWS_SYSTEM_BORDER)
        void setupWindows10BorderWorkaround();
        std::unique_ptr<QObject> borderHandler;
#endif
    };