Variation on Group avatar flair doesn't apply to existing members
- create group “primarygroup”
- add a user to it
- add flair to the group (arrow-pointer)
- set the group as “automatically set as primary group” → user now has this as primary group and has the flair for the group
- create group “secondaryprimarygroup”
- add the same user to it
- add (different) flair to the group (atom)
- set the group as “automatically set as primary group” → user now has this as primary group
but still has the flair for the first group 
