fix: wayland 插件右键菜单显示后点击桌面不会关闭

点击菜单区域以外关闭菜单的逻辑：
1. 有parent的kwin会关闭
2. 没有parent的Qt会在失去焦点时关闭
由于dock无焦点，wayland 菜单无焦点，无父对象的菜单就关闭不了。
规避方案给菜单加上parent，后续如果菜单的role改变应该可以彻底避免。

Bug: https://pms.uniontech.com/bug-view-124531.html
Influence: wayland plugin menu close
Log:
Change-Id: Id9c80f5131f0171469a279e6c7c7b54a0a3e8791

frame/item/dockitem.cpp

@@ -249,6 +249,9 @@ void DockItem::showContextMenu()
     hidePopup();
     emit requestWindowAutoHide(false);
 
+    if (!m_contextMenu.parentWidget())
+        m_contextMenu.setParent(topLevelWidget(), Qt::Popup);
+
     m_contextMenu.exec(QCursor::pos());
 
     onContextMenuAccepted();

plugins/tray/snitraywidget.cpp

@@ -284,6 +284,8 @@ void SNITrayWidget::initMenu()
     qDebug() << "generate the sni menu object";
 
     m_menu = m_dbusMenuImporter->menu();
+    if (m_menu && !m_menu->parentWidget())
+        m_menu->setParent(topLevelWidget(), Qt::Popup);
 
     qDebug() << "the sni menu obect is:" << m_menu;
 }

plugins/tray/system-trays/systemtrayitem.cpp

@@ -451,6 +451,9 @@ void SystemTrayItem::showContextMenu()
     hidePopup();
     emit requestWindowAutoHide(false);
 
+    if (!m_contextMenu.parentWidget())
+        m_contextMenu.setParent(topLevelWidget(), Qt::Popup);
+
     m_contextMenu.exec(QCursor::pos());
 
     onContextMenuAccepted();