title: PresentViewController from a presentedViewController is not showing navigation bar
body: <p>I have three view controllers (vc1, vc2, vc3) and two navigation controllers (nav1, nav2).</p>
  
  <ul>
  <li>nav1 is the entry point of the storyboard.</li>
  <li>vc1 is the rootViewController of nav1.</li>
  <li>vc2 is the rootViewController of nav2. </li>
  <li>nav2 is presented from vc1 through nav1.</li>
  </ul>
  
  <p>Now when I tried to present vc3 from vc2 through nav2, navigation bar is not showing. </p>