title: Xcode 8 attribute "hidden" does not hide view in Interface Builder
body: <p>seems like Apple change how Interface Builder behaves in Xcode 8? Because when I check <em>hidden</em> in <em>Attributes Inspector</em> on a view in Interface Builder, that view is still visible.</p>
  
  <p>This makes it very tedious to work with views where some views needs to be the view with the highest "z value", the front most view that is.</p>
  
  <p>Is there some other way to show the green view in this example, than to change the order of them to the right (i.e. change their "z value")</p>
  
  <p>In the image below <em>hidden</em> is checked, but I still don't see the green view below. You can download this <a href="https://github.com/Sajjon/Xcode8InterfaceBuilderDoesNotHideView" rel="noreferrer">trivial project at github</a></p>
  
  <p>When the project is run, the green view is indeed shown, but the issues is that it is annoying when working in Interface Builder.</p>
  
  <p><a href="https://i.stack.imgur.com/VedKo.png" rel="noreferrer"><img src="https://i.stack.imgur.com/VedKo.png" alt="enter image description here"></a></p>
  
  <p><strong>Am I missing something?</strong></p>