#155 Role Edit - Category roles have non user friendly rights

[Miro Halas]

WHen we automatically create Viewer, Modifier, Manager
for given category, the granted access rights table
shows under category text "Special value XXX" where XXX
is the same for all types and under category value
"Special value YYY".

The problem is that it should say for cateogry text the
name
of the attribute it represents (e.g. Category) and for
category value the name of the category (e.g. Accounting).

This should be resolved somehow generically so if I put
other
columns there (e.g. Entity for file type or file) it
would still
work.