title: UIPopoverController does not dismiss when clicking on the NavigationBar
body: <p>When clicking on a rightBarButton, a UIPopoverController will present. </p>
  
  <p>The problem is: when clicking on the NavigationBar, this UIPopoverController does not dismiss.</p>
  
  <p>Why? And is there a way to resolve it?
  I have tried to search, but can't find anything about this. </p>
  
  <p>Thanks in advance.</p>