title: UIImagePicker cameraOverlayView appears on Retake screen
body: <p>I am struggling with a problem. 
  I am capturing a video, and i had put an UIImageView with an UIImage in it as the UIImagePicker CameraOverLay.
  So when the user starts the camera in order to capture a video, he can see an overlay on the camera. When the user stops capturing, and is being moved to the "cancel or Retake" screen of  the UIImagePicker, the cameraOverlayView is still visible. </p>
  
  <p>any ideas on how to not display the overlay in the "retake or cancel" screen?</p>