Drag 'n drop of contacts in Addresses

[Sebastian Reitenbach]

Hi,

here is my second problem I noticed with Addresses:

I can drag 'n drop
a person from one group to another, and the person gets copied, afterward
existing in multiple groups. Wouldn't it be better to ask whether to copy or 
move
that person between groups? Related to that, how do I remove a person
from a group?

Someone has a recommendation here?

Sebastian