title: How to create QKeySequence like "Fn" + Key_Up
body: <p><br>
  As i understood from Qt documentation (<code>QKeySequence</code>, <code>Qt</code> global namespace), i can't use notebook <code>Fn</code> key as shortcut modifier.<br>The only modifiers Qt knows are: <code>Shift</code>, <code>Control</code>, <code>Alt</code>, <code>Meta</code>. But no <code>Fn</code>!<br><br>
  But may be some hacky way exists? like specifying <code>Fn</code> code directly.</p>
  
  <p>Code:</p>
  
  <pre><code>m_actionGoToFirstPage-&gt;setShortcut( QKeySequence( Qt::Key_Up /*| Qt::Fn ???*/ ) );
  </code></pre>