When I'm subscribed to a podcast in iTunes, and look it up in my Library, it lists the episodes I've never downloaded (in grey) and the ones on my machine (in black), but when I download and then delete an episode, it gets removed from the list entirely. It would be great to delete an episode but have it stay in the list, in grey, so you have the option to download it again. How do I delete an episode of a podcast but keep it in the overall list?