title: Adding alphabetically items to QComboBox using PySide
body: <p>I would like to add new items to my <em>QtGui.QComboBox</em>. Where the new items should appers alphabetically in my <em>QtGui.QComboBox</em>.</p>
  
  <p>Is there a way to define a police, that the list is always alphabetical sorted after using <em>QtGui.QComboBox.addItem(value)</em>?</p>
  
  <p>In not, how could i sort my <em>QtGui.QComboBox</em> items?</p>
  
  <p><strong>Additional Info</strong>:
  Python v3.4.1 and PySide v1.2.2</p>