The author also could create a new post stating that some changes have been made if it's worth an update in his opinion. I don't think any other concept is needed since editing posts is more wiki-like than forum-like. If your forum relies on something like this you might consider using a wiki platform instead or additionally.
On master the group title setting has moved from the settings page to the profile edit page. In the database the groupTitle property is in the user hash(user:1) now instead of the user settings hash(user:1:settings).