Totally fix top border issue on Win10 for QtWidgets

Sine Striker

2023-12-26 6b2d31247dc2c2804e571b31a71c8a423c1db9d4

 src/widgets/widgetwindowagent.h

@@ -26,6 +26,7 @@
        QWidget *systemButton(SystemButton button) const;
        void setSystemButton(SystemButton button, QWidget *w);

        // Not implement, don't use now
#ifdef Q_OS_MAC
        QWidget *systemButtonArea() const;
        void setSystemButtonArea(QWidget *widget);