title: Bootstrap Modal with button(img) that hangs over the edge
body: <p>I'm trying to have a close button "hang" off the corner of my modal, something like this: <a href="http://i.imgur.com/3rminEM.png" rel="nofollow">http://i.imgur.com/3rminEM.png</a></p>
  
  <p>I've tried giving the corner image display:inline;float:right; and some relative positioning, but nothing gets displayed outside of the Modal's internal area ( and sometimes the Modal gains a scrollbar to show the image when scrolled). I tried increasing the z-index too, to no avail.</p>
  
  <p>Is there any way to do this? Perhaps a background image for the Modal itself? Alternative Modals? I'm using GWT with gwt-bootstrap, so hopefully there is some css-only solution.</p>