SystemDialog: Make sure the window has a Qt.Window type
Rather than a Qt.Dialog type, which for some reason makes kwin_x11 render decorations without the close (X) button. (cherry picked from commit b3c2de31)
Rather than a Qt.Dialog type, which for some reason makes kwin_x11 render decorations without the close (X) button. (cherry picked from commit b3c2de31)