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.
Post to Social Media Options Missing
I'm sure that this is something silly, like I didn't install a needed plugin, but I can't figure out which one it would be. I've not installed a plugin for this in the past, I swear. I have a new community that was just stood up yesterday, https://findinghopetogether.org/ and when you go to a topic the options to post it to Twitter, Facebook and Google are missing. What do I need to get them set up?
It's a pure vanilla 1.2.0 install done fresh yesterday.
@scottalanmiller got to ACP -> General -> Social and make sure the options are turned on.