Fixed feature test (# of resources in admin users table)
Merged Michael's display_if_people_are_groups

Squashed commit of the following:

commit e96c76942ed2024159ee00c66d3a5b7a2e69b15c
Author: Michał Podlecki <m.podlecki@op.pl>
Date:   Tue Nov 12 11:24:34 2013 +0100

    display if people are groups; ability to filter them