Ability to create categories

[Alpadro]

Would be great to be able to create individual categories like "Freinds" , "Work" , "Family" , etc. and that you are able to put your contacts into that categories. Any category should also have the ability to hide and expand its content (contacts) by a click onto it.

Maybe it would also be a good idea to implement an optional function that all contacts which are currently offline will be displayed in the category "Offline".

This would help to have a better overview, if you have many contacts in your list.