Add the ability to "rollback" board activity...

[ITBill (Bill Moller)]

It seems the activity log records/audits all actions taken by all users. I propose adding a function to allow administrators (or owners) to “rollback” activity to a specific point in time. This would cover cases of errant or malicious mass changes. The Activity log seems to already contain everything necessary to perform the rollback… what was changed, old value, new value, etc.