History of content changes

[nos3]

Users would like to be able to undo changes made, like inserting a new item, updating or deleting an existing one. This could be done by implementing a decorator that saves the item record and the operation before it's modified to a "history" table via a manager in the MAdmin name space. The user could then revert changes via a panel in the portal view in combination with a controller restoring the original items and saving them by using the appropriate manager.