feat: allow navigator to send notification to user
https://issues.unige.ch/browse/DLCM-2106
Can be tested with portal dlcm/ui/dlcm-portal!473 (merged)
Edited by Florent Poittevin
https://issues.unige.ch/browse/DLCM-2106
Can be tested with portal dlcm/ui/dlcm-portal!473 (merged)