title: Is there a way to do drag-and-drop re-ordering of the preview elements in a dropzone.js instance?
body: <p>I have a dropzone.js instance on a web page with the following options:</p>
  
  <pre><code>autoProcessQueue:false
  uploadMultiple:true
  parallelUploads:20
  maxFiles:20
  </code></pre>
  
  <p>It is programmatically instantiated, as it is part of a larger form.  I have it rigged up to process the queue when the form is submitted.  </p>
  
  <p>The goal is for my users to be able to use the dropzone to manage images for an item, so I'd like them to be able to re-order the images by dragging and dropping the dropzone.js image previews.  Is there a good way to do this?  I've tried using jquery-ui's sortable but it doesn't seem to play nice with dropzone.js.</p>