Fixed display of contacts in the Accounts pane of the Get Info window; contacts in...

Fixed display of contacts in the Accounts pane of the Get Info window; contacts in multiple groups are now handled properly with the exception that it's arguably a bug that a metacontact made because two contacts with the same name are in the same group isn't automatically split if you then move one of those contacts to a different group. In any case, this is Righter.

git-svn-id: svn://svn.adiumx.com/adium/branches/adium-1.0@18523 1c916fce-81e2-0310-a464-8ca513f45935