title: Can't create a IBOutlet for WebKit view in Swift 4
body: <p>I am trying to put a website in the middle of my storyboard.  When I add the view controller and try to connect it to a new ViewController, I cannot control-drag the object to create the Outlet.  I can create outlets for Labels and buttons, and all the rest of the normal objects.  Just not for the webkit view control. It works if I try it in a new project just like it is supposed to. Is this a bug or is something in my program blocking web content? 
  There is no code to share since I can't get that far. </p>