title: chosen not update after select option changes by jquery
body: <p>I have a hidden(display:none) select option, according to it chosen created,</p>
  
  <pre><code>    &lt;div&gt;
          &lt;select class="fpd-elements-dropdown" style="display: none;"&gt;
              &lt;option value="none"&gt;None&lt;/option&gt;
          &lt;option value="1406378948898"&gt;Base&lt;/option&gt;&lt;option value="1406378949108"&gt;Shadow&lt;/option&gt;&lt;/select&gt;
          &lt;div class="chosen-container chosen-container-single fpd-border-color" style="width: 100%;" title=""&gt;
          &lt;a tabindex="-1" class="chosen-single"&gt;&lt;span&gt;None&lt;/span&gt;&lt;div&gt;&lt;b&gt;&lt;/b&gt;&lt;/div&gt;&lt;/a&gt;&lt;div class="chosen-drop"&gt;
          &lt;div class="chosen-search"&gt;&lt;input type="text" autocomplete="off"&gt;&lt;/div&gt;&lt;ul class="chosen-results"&gt;&lt;/ul&gt;
          &lt;/div&gt;
          &lt;/div&gt;
      &lt;/div&gt;
  </code></pre>
  
  <p>Then I want change (select one element(Base) by default) 
  I try below jquery code</p>
  
  <pre><code>//$(' .fpd-elements-dropdown').show();
   $('.fpd-elements-dropdown option:contains(Base)').prop('selected','selected');
  //$('.fpd-elements-dropdown').val($('.fpd-elements-dropdown option:contains(Base)').val());  
  $('.chosen-container-single').trigger('chosen:updated');   
  </code></pre>
  
  <p>select option changed but chosen not changed 
  also I try </p>
  
  <pre><code>$('.chosen-container-single').trigger("liszt:updated");
  </code></pre>
  
  <p>but chosen selected Item not changes</p>