title: ObjectListView sorting on date
body: <p>In my <code>ObjectListView</code> I have a column that is a date format, using <code>{0:d/M HH:mm}</code> as the date format.  When I click the column header it sorts numerically and not by the date, </p>
  
  <p>e.g. </p>
  
  <pre><code>1/2/2013
  2/10/2013
  3/1/2013
  </code></pre>
  
  <p>Instead of</p>
  
  <pre><code>2/10/2013
  1/2/2013
  3/1/2013
  </code></pre>
  
  <p>How can I set this correctly?</p>