Another bunch of refactoring: board moderators and membergroups

A $user_info left around... Thanks Norv!

Signed-off-by: emanuele <emanuele45@gmail.com>
Another getGroupModerators

Fixed wrong variable name - Thanks Norv

Signed-off-by: emanuele <emanuele45@gmail.com>
Created a membergroupById that retrieves only 1 group and used the new function

Signed-off-by: emanuele <emanuele45@gmail.com>
Missed separator.

Signed-off-by: Norv <a.w.norv@gmail.com>