title: "Any" size class missing in Xcode 8
body: <p>I'm a little confused when seeing the new interface builder's size class options in Xcode 8 beta. I used to build my apps' UI by first design them in "Any" size class and then do some custom adjustments in the other ones. Is the workflow supposed to be changed in this new version of Xcode?</p>
  
  <p><a href="https://i.stack.imgur.com/WW0iK.png" rel="noreferrer"><img src="https://i.stack.imgur.com/WW0iK.png" alt="Any size class in Xcode 7"></a></p>