title: UIMenuController fails to create a popup menu when Guided Access is on
body: <p>I noticed my app build with Xamarin.ios is failing while running with Guided Access enabled.</p>
  
  <p>Specifically,UIMenuController failed to create a popup menu on long touch</p>
  
  <pre><code>UIMenuController uim = UIMenuController.SharedMenuController; 
  //build menu items in list 
  uim.MenuItems = list.ToArray (); 
  //loc  is location in View - loc=_gr.LocationInView (this.View); 
  //while _gr is a UILongPressGestureRecognizer  
  uim.SetTargetRect (new RectangleF(loc.X, loc.Y, 1, 1), this.View); 
  uim.SetMenuVisible (true, true);
  </code></pre>
  
  <p>I checked in debugger uim.MenuFrame is zero size frame</p>
  
  <p>Otherwise the code works just fine if Guided Access is not enabled. I am running ios7 with app compiled with ios7 sdk. With ios6 and Guided Access enabled menu works just fine.</p>
  
  <p>Any ideas?</p>