title: Datebox : hideInput causes Header to disappear
body: <p>on JQueryMobile Datebox setting <code>hideInput: "true"</code> causes the Header to disappear?</p>
  
  <pre><code>&lt;div data-role="page" data-theme="c" id="roster" data-add-back-btn="true"&gt;
      &lt;div data-role="header" class="tb"&gt;
          &lt;h1&gt;Roster&lt;/h1&gt;
          &lt;input name="mydate" id="mydate" type="date" data-role="datebox" data-options='{"mode": "cal box", "hideInput": "true"}'&gt;
      &lt;/div&gt;
  
      &lt;div data-role="content" data-theme="b" id="callback"&gt;  
            &lt;!-- CONTENT LOADED VIA AJAX --&gt;          
      &lt;/div&gt;
  
      &lt;div data-role="footer"&gt;
            &lt;h4&gt;Page Footer&lt;/h4&gt;
      &lt;/div&gt;
  &lt;/div&gt;
  </code></pre>
  
  <p>Header is visible when I remove <code>"hideInput": "true"</code> but gone if I just change to "false"</p>