Delay Profiles

This is to separate delays out to their profile (do we need a better name?) and choose preference of usenet or torrents and set delays independently.

I also changed the delays to minutes instead of hours so its more granular. I haven't done any UI work, removing old delays in profile or adding in the new UI.
I think calling it `DelayProfile` is a bit misleading since `PreferredProtocol` clearly falls outside of delay, maybe calling it Download profile or download policy?