Ideas for Favorite Improvements

[levlaz]

It seems that the f key to favorite a post does not work if you are reading the post. This makes the interaction a bit awkward because if I exit, its marked as read, so then I need to search for it with the read filter on, then when I favorite it it dissapears. It would be great to do the following.

1. Allow users to favorite from within a post
2. Make the favorites view show unread or read posts by default instead of needing to explicitly filter with M first.

[guyfedwards]

Number 2 fixed as part of #85