Feature request: unchain-block

[plusteamvn]

So I blocked a user with massive followers long time ago, and now just find out that they have participated many giveaway contests that required to follow that user. So those users in that giveaway contest are innocent and i would like a way to undo those blockings.
Thank you, love your tool by the way.

[cooljeanius]

Related: it'd be useful to have a history of past chain-blocks with an "undo" button next to each of them in case