Making mosaic script simpler by relying on new attribute.

Where could that attribute have come from, anyway?
Advisors uses CM IDs, not person IDs. Switching extension over.
Switch to using CM ids directly.

Extension page loads faster since it doesn't have to get the profile by
person ID to get the CM ID. Which was a dumb thing anyway that I promise
I was going to fix later but now I don't have to.