Upgrade Sonador to most recent builds of Orthanc and plugins.

• Upgrade Orthanc Advanced Authorization plugin to 0.8.1 (orthanc-sonador#51 (closed))
• Integrate Orthanc Explorer 2 and OHIF v3 permissions and access into the Sonador admin, and provide a link if users have permission to utilize the interface

Create maintenance routines which monitor changes to Sonador users/groups and cleanup Orthanc representation

• Create background task to watch user/group history endpoints and removes stale policies