- fixes a missing reassignment to the new named variable causing the selection of group aliases to fail in the user selector view of private messages
- apply the list of excludes when a user selects a group alias to prevent double selection of users already in the list and selection of oneself
when configured by the admin a group can be found through the @mentions
feature in both the compose/reply and the private message user-selectors
and once selected the mention will be replaced by the list of users in
the group
