minor improve quick demo

Zhao Yuhang

2023-12-18 44fee9aa1e3087635d1394612c6f6ceab44ba7b0

 src/core/contexts/cocoawindowcontext.mm

@@ -382,12 +382,15 @@
        AbstractWindowContext::virtual_hook(id, data);
    }

    void CocoaWindowContext::winIdChanged(QWindow *oldWindow, bool destroyed) {
    void CocoaWindowContext::winIdChanged(QWindow *oldWindow) {
        releaseWindowProxy(windowId);
        if (!m_windowHandle) {
            return;
        }
        
        windowId = m_windowHandle->winId();
        ensureWindowProxy(windowId)->setSystemTitleBarVisible(false);
        cocoaWindowEventFilter = std::make_unique<CocoaWindowEventFilter>(this, this);
        return true;
    }

}