title: how to save sorting order in select2() field?
body: <p>I'm using <code>select2()</code> field using <a href="https://github.com/ivaynberg/select2" rel="nofollow">select2</a> library and <em>Drag and Drop Sorting</em> is enabled in the field.</p>
  
  <p>It works well, but once i save it, the ordering break and they are ordered alphabetically.</p>
  
  <p>I was wondering if its possible to anyhow save ordering of elements after <em>drag drop</em> in select2() fields.</p>
  
  <p>Please suggest.</p>