title: Mail UIActivityViewController not dismissing
body: <p>I have a UIActivityViewController which won't dismiss the Mail dialog on the iPad. The code is standard from an Apple example and it works fine on the iPhone.</p>
  
  <pre><code>   NSString* someText = [NSString stringWithFormat:@"%@ Is really cool, sent from Element Story. en.wikipedia.info/wiki/%@",
                            [_detailItem description], [_detailItem description]];
  
     ActivityViewCustomProvider *customProvider =
      [[ActivityViewCustomProvider alloc]init];
  
      NSArray *items = [NSArray arrayWithObjects:customProvider,imageView.image,someText, nil];
  
      //ActivityViewCustomActivity *ca = [[ActivityViewCustomActivity alloc]init];
  
  
      // ...or whatever pieces of data you want to share.
      UIActivityViewController *activityVC =
      [[UIActivityViewController alloc] initWithActivityItems:items applicationActivities:nil];
                                        //applicationActivities:[NSArray arrayWithObject:ca]];
  
  activityVC.excludedActivityTypes = @[UIActivityTypeAssignToContact, UIActivityTypePrint, UIActivityTypeCopyToPasteboard];
      [self presentViewController:activityVC animated:YES completion:^{}];
  </code></pre>