ISTWCMS-6695 Contacts in multiple groups should only appear once when the list is filtered by multiple groups
requested to merge feature/ISTWCMS-6695-Contacts-in-multiple-groups-should-only-appear-once-filtered-by-multiple-groups into 1.0.x
ISTWCMS-6695 Contacts in multiple groups should only appear once when the list is filtered by multiple groups