title: How to place combobox in the tab's title?
body: <p>Is it possible to show combobox (better if it will be extjs combo) in the tab's title?  </p>
  
  <p>I have created <a href="http://jsfiddle.net/andron/v4ZzT/" rel="nofollow">an example on jsfiddle</a> but there are such issues:<br>
  1. It is not possible to show combo's options list (mouse click don't work)<br>
  2. Tab's height is incorrect (I guess this can be fixed by applying height to the combo).</p>
  
  <p>Sample code:</p>
  
  <pre><code>new Ext.TabPanel({
      renderTo: 'tab-with-combo',
      activeTab: 0,
      items:[
          {
              title: 'First tab ' +
                  '&lt;select&gt;' +
                      '&lt;option&gt;Option 1&lt;/option&gt;' +
                      '&lt;option&gt;Option 2&lt;/option&gt;' +
                  '&lt;/select&gt;'},
          {title: 'Second tab'}
      ]
  });
  </code></pre>