title: view bounds change after disposing UIActivityViewController on iOS 7 in landscape mode
body: <p>I'm having a strange behavior when using a UIActivityViewController:</p>
  
  <p>I have a UIViewController (768x704) with a share button. When I tap the share button, a UIActivityView opens. After closing the ActivityView, my navigation bar (or the view controller itself) changes its size.</p>
  
  <p>Here's the code:</p>
  
  <pre><code>NSLog(@"Old bounds: %@",NSStringFromCGRect(self.view.bounds));
  
  UIActivityViewController* activityViewController = [[UIActivityViewController alloc] initWithActivityItems:[NSArray arrayWithObject:shareText] applicationActivities:nil];
  [activityViewController setCompletionHandler:^(NSString *activityType, BOOL completed){
      NSLog(@"New bounds: %@",NSStringFromCGRect(self.view.bounds));
  }];
  
  [self presentViewController:activityViewController animated:YES completion:^{}]; 
  </code></pre>
  
  <p>The output:</p>
  
  <pre><code>Old Bounds: {{0, 0}, {768, 704}}
  New Bounds: {{0, 0}, {768, 724}}
  </code></pre>
  
  <p>Seems to be the height of the status bar.</p>
  
  <p>This only happens with iOS 7, on iPad in landscape mode. Any other scenario works well - without any glitches.</p>
  
  <p>Could this be a bug in iOS7? Or is it just me, doing something wrong?</p>