Suggestion: revision control for posts

[13.]

HI.

Sorry for my english, i hope you'll understand. :)

I request to introduce the possibility of version control for messages.

Now if the user edited a post, it can never go back to the previous version. This becomes a problem if the user misuses the editing function.

Also, if user's account is hacked and hacker is edited all his posts here is no way to recover it. Of course this is not the only example where the inability to roll back post is a problem.