Previous behavior required the specification of all three group security groups before the
"Save Settings" button would be enabled.
This adds a check into users.py which checks that the group is set before searching and
removes the javascript preventing the specification of any combination of groups.
Tested:
- Tested all combinations on AD after MR 1238
- Tested all combinations on OpenLDAP
- Tested enabling the Group Security with no groups set which correctly prevents login
Resolves#1462