title: Navigation bar doesn't appear in uiviewtable in popupovercontrol
body: <p>I have PopupoverControl and this popup has UIViewtablecontrol and one of UITable control should navigate to another UIViewtablecontrol but it doesn't navigate this is the code in selection in first uitableview:</p>
  
  <pre><code>OpenFileViewController *openfileview = [[OpenFileViewController alloc] initWithNibName:@"OpenFileViewController" bundle:nil v_files:[self GetFiles] v_ui:parentview];
          UINavigationController *navController = [[UINavigationController alloc] initWithRootViewController:openfileview];
          [self.navigationController presentModalViewController:navController animated:YES];
  </code></pre>
  
  <p>in .xib file in both uiviewtable I enabled Top Bar with Navigation Bar but it doesn't appear why?</p>