ActivitiesModule: fixed comma in list of logged users
ActivitiesModule: fixed comma in list of logged users

4IT442-Kompetencni-Centrum/SQATool,4IT442-Kompetencni-Centrum/SQATool,4IT442-Kompetencni-Centrum/SQATool,4IT442-Kompetencni-Centrum/SQATool