title: Bootstrap dropdown menu, the rounded corners do not stay
body: <p>I use bootstrap and I want to make a dropdown menu with rounded corners.
  The dropdown menu now has rounded corners but when I put the mouse somewhere else the dropdown box has no round corners anymore. But the dropdown menu has to collapse back up, but the dropdown menu will stay visible. </p>
  
  <p>How can I fix this problem? I can't find anything about this.</p>
  
  <p>See the link below for the code.</p>
  
  <p><a href="http://www.bootply.com/XsQRcmQSfy" rel="nofollow">http://www.bootply.com/XsQRcmQSfy</a></p>