title: jQuery Mobile - listview() with data-filter="true" and ajax content
body: <p>This is my html:</p>
  
  <pre><code>&lt;ul data-role="list-view" data-filter="true"&gt;&lt;/ul&gt;
  </code></pre>
  
  <p>My JS loads the ul with data and then I call listview().</p>
  
  <pre><code>$('#page').live('pagebeforecreate', function(){
          // My Ajax code
      });
      $('#page').live("pageinit", function(){
          $('#page ul').listview();
      });
  </code></pre>
  
  <p>That works except the search bar at the top doesn't appear.  What am I missing?</p>