Note: this is now implemented in 1.6, it just needs to be forward-ported to 1.8.
A common request is to be able to create groups of audience categories. When there are more than a handful of audiences, this would become useful.
Currently an audience category has a name and a label, the name is just an internal ID and can't be changed once created, the label can be changed by the admin user at any point.
I suggest that grouping emerges when “:” appears in the audience label. For instance, say these category labels exist in an MKDoc database:
Cats
Dogs
English Regions: South-East
English Regions : North
English Regions: South-West
Rabbits
The category listing presented to the user will look like this:
Cats
Dogs
Rabbits
English Regions
North
South-East
South-West