Background:
Prior to v5.15, the Group Maintenance menu included a people selector, so you could simply pick a number of people, irrespective of workgroup/employer etc. and update their details as required - such as workgroup/Supervisor etc.
This is a massive step back, as Site Admins will regularly pick a number of people (now we can only text search for one person) and change their workgroup/Supervisor etc. - now they have to filter by workgroups and update person by person...
Suggestion:
Put the People Search Menu editor back... (as per image...)