title: Angular modal-window close confirmation
body: <p>I have an angular-ui modal window, and, obviously, when I click outside the modal(backdrop) the modal closes.</p>
  
  <p>However, I would like to change this behavior, for example, when I click on the backdrop, the popup window shows up with 2 buttons (OK and Cancel) and the modal will NOT close on Cancel.</p>
  
  <p>The popup phase is easy, but I am not sure how to stop the modal from closing.</p>
  
  <p>Could anybody help me with this, please? Thanks a lot!</p>