improve qml demo

Zhao Yuhang

2024-05-08 85e783997ffd9629cdaef44b7d482f23c8ca49cb

 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) {