Fix dashboard student view for non-admins.
Fix dashboard student view for non-admins.

Entering the student view as non-admin used to fail to a JavaScript error,
because the scope didn't have group users assigned to it.

brentstineman/SCAMP,CodeFluent/SCAMP,brentstineman/SCAMP,CodeFluent/SCAMP,brentstineman/SCAMP,CodeFluent/SCAMP,brentstineman/SCAMP,CodeFluent/SCAMP