title: JQuery UI disabling reorder in sortable lists
body: <p>So I have two sortable lists in a web app I'm writing. What I want to do is make one of the lists not be reorder-able, but allow it's items to be dragged onto the other list. Items from list one can be dropped on list two, but items on list one can't be rearranged.</p>
  
  <p>Another thing I want to do is to make it so when items are dragged off of list one they're not removed from list one; the dragged item is only dragging a copy.</p>
  
  <p>The end goal is to have a toolbox thing that allows the user to drag elements into a "canvas" of sorts. Elements in the toolbox aren't rearrangement and once they're dragged off the don't go away (so the user is just dragging copies).</p>
  
  <p>Help with either disabling reordering or making copies dragged off would be much appreciated!</p>
  
  <p>(I can post my list code if you guys need it)</p>