title: QMessageBox::critical make it stay on top
body: <p>I'm currently using static called <code>QMessageBox::critical()</code> message box and I really need it to stay on top of all windows. Does somebody has an idea how to implement it?</p>
  
  <p>Only static version of <code>QMessageBox</code> is needed.</p>
  
  <p>Thanks in advance.</p>