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
Merge pull request #62 from VinceMacBuche/ust_3142/dev/3143/3144/Improve_rollback_feature

Fixes #3142 : Display rollbacked events