title: xcode 4.5, view size not editable in interface builder
body: <p>I started my project since xcode 4.4, and I have created several view controllers with interface builder (with xib files). Several days ago, I upgraded the xcode to version 4.5. Today, I suddenly found that I could modify view size anymore in interface builder. Is this an intended feature of xcode 4.5 or is it a bug of xcode 4.5?</p>