title: QComboBox AbstractItemView::item
body: <p>Is there a way I could increase the height of the items, which are listed in a QComboBox control ?</p>
  
  <p>I tried following as suggested here <a href="http://qt-project.org/forums/viewthread/3474" rel="noreferrer">in QTDevNet forums</a> but with no luck</p>
  
  <pre><code>QComboBox QAbstractItemView::item {margin-top: 3px;}
  </code></pre>
  
  <p>I also tried this, still with no result. </p>
  
  <pre><code>QComboBox QAbstractItemView::item {min-height: 20px;}
  </code></pre>
  
  <p>Is it possible to achieve this at style-sheet level at all ?</p>