title: Option for dynamic prototypes not appearing in the attributes inspector
body: <p>I have a UITableView that I just added to my project and the option is not appearing for me to choose the content (dynamic prototypes or static cells).  I have used UITableViews in other iOS projects, but for some reason it's not appearing this time.  I'm using XCode 4.4.1.</p>
  
  <p>Here is the a screenshot of the way it looks in another project:</p>
  
  <p><img src="https://i.stack.imgur.com/nn7lN.png" alt="A working example from another project"></p>
  
  <p>Here is the screenshot of in the project I'm working in now where it's not appearing:</p>
  
  <p><img src="https://i.stack.imgur.com/vd2fJ.png" alt="Screenshot that is missing properties"></p>
  
  <p>Does anyone know what I am missing? I can't figure out what I have done differently.</p>