Fix up group ghosties. 🔼

Not only is it STILL not completely clearing out logged in people, it seems to keep yet another copy of "logged in or not" for groups. Would not surprise me if it was per group.

So the IG members support group, for example, has lots of people listed as "online" that are not, and lots of people listed as "unknown".

reported=2020-01-31 06:23:01