Minor bug whenever you edit an opening post

By default, a topic that you create is automatically added to your watchlist for you to go check up on.

However, there's a minor bug where the topic is removed from your watchlist every time you edit the opening post.

Never noticed that but yeah, it does

@deannunaki: the watched feature has been on an off all year, a lot of the time it turns on and off when you post in a thread as well.