title: Jquery Chosen plugin. Select multiple of the same option
body: <p>I'm using the chosen plugin to build multiple select input fields. See an example here: <a href="http://harvesthq.github.io/chosen/#multiple-select" rel="nofollow">http://harvesthq.github.io/chosen/#multiple-select</a></p>
  
  <p>The default behavior disables an option if it has already been selected. In the example above, if you were to select "Afghanistan", it would be greyed out in the drop-down menu, thus disallowing you from selecting it a second time. </p>
  
  <p>I need to be able to select the same option more than once. Is there any setting in the plugin or manual override I can add that will allow for this?</p>