title: VueDraggable : allow cloning only
body: <p>Using this as an example<br>
  <a href="https://sortablejs.github.io/Vue.Draggable/#/clone" rel="nofollow noreferrer">https://sortablejs.github.io/Vue.Draggable/#/clone</a></p>
  
  <p>Imagine this is a shopping site and<br>
  "Draggable 1" is the items available in the shop<br>
  and "Draggable 2" is the user shopping cart.  </p>
  
  <p>User should be able to drag a item from available item to the shopping cart (which was achieved in the example).<br>
  But this should not be allowed to reorder the available item, how can I disable the dragging within the same draggable?</p>