* N°5135 - Impersonate: history of changes versus log entries
* N°5135 - enrich impersonated changelog userinfo with its previous value when overrided by an extension (ie approvalbase)
* N°5135 - indicate impersonation inside changelogs in both caselogs and activity
* N°5135 - Impersonate: history of changes versus log entries add specific username for caselogs
Co-authored-by: Eric Espie <eric.espie@combodo.com>