improve sysmenu behavior

Zhao Yuhang

2024-05-07 357532958f2e806c69c96f018333a45e65e35201

 examples/shared/widgetframe/windowbar.cpp

@@ -25,7 +25,7 @@
        if (QLocale::system().textDirection() == Qt::RightToLeft) {
            layout->setDirection(QBoxLayout::RightToLeft);
        }
        

        layout->setContentsMargins(QMargins());
        layout->setSpacing(0);
        for (int i = IconButton; i <= CloseButton; ++i) {