title: jquery ui sortables connect lists: copy items
body: <p>I have two lists, I want both of them to be sortable and want to be able to copy (drag) items from list1 to list2 and vice versa.</p>
  
  <p><a href="http://jqueryui.com/demos/sortable/#connect-lists" rel="noreferrer">http://jqueryui.com/demos/sortable/#connect-lists</a></p>
  
  <p>Is what I want, but the items are moved, not copied.
  I did a few experiments with draggables and droppables, but I can't get to to work keeping them sortable. For example: <a href="http://jsfiddle.net/tunafish/dvXmf/" rel="noreferrer">http://jsfiddle.net/tunafish/dvXmf/</a></p>