Merge pull request #55 from VinceMacBuche/bug_3124/Enable_archive_buttons

Fixes #3124 : Enable Archive button and make them clickable
Ref #3143 : Add a rollback event, handle it in the event log table
Fixes #3144 : Link restoration commit to modification ID, you can now perform rollback on those events
Fixes #3143 : Improve display of rollback event : you can now consult rollbacked event