Remove isRoot method.
Add new methods to check if system user/group.
Add methods to check if system user/group.
Use new methods to determine if system user.
Add methods to check if System user to editor.
Add method to check if System user.
Add negative removed when updated call.
Update initialization of pop-up menu.
Add methods to load system users and groups.
Use Roles to determine if user is a system user.
Review usage of system group.
Remove isSystemGroup method (introduced recently)
Remove usage of isSystemGroup
Remove unused import.
Remove usage of System groups fields.