title: How to give JointJS elements a remove tool?
body: <p>In JointJS, links come with a handy responsive tool for removing links (when you hover over the link, an "x" appears, and clicking it removes the link).   Elements, on the other hand, have a remove() method in the API, but don't have the UI "x" to expose that method to users.</p>
  
  <p>Is there a straightforward way to give users the ability to delete elements in the UI?</p>