title: QT QTableWidget not appearing in QTabWidget
body: <p>I have an application which uses multiple tabs. I used <code>QTabWidget</code>. On some tabs I needed to show tables, so I used <code>QTableWidget</code>.</p>
  
  <p>The code snippet is:</p>
  
  <pre><code>QWidget *qwgt = qPreviewTabs-&gt;widget(Index);
  QTableWidget *qDrvTab = new QTableWidget();
  ....
  ....
  ....
  QVBoxLayout *vbLyt = new QVBoxLayout();
  vbLyt-&gt;addWidget(qDrvTab);
  qwgt-&gt;setLayout(vbLyt); 
  </code></pre>
  
  <p>When I add push buttons and tree widgets they all appear on the specified tab without any problem. Only the <code>QTableWidget</code> refuses to show.</p>