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QA is happening as part of code review.

Indicator definitions: https://docs.google.com/a/dimagi.com/spreadsheets/d/1Ug09IcbogB9JyCIGS2vHV0kRTn2U_zO-Y9HRAinOpT0/edit#gid=1495052602

@emord @czue @esoergel 
Not sure which way it should go in the other `terms_facets` here, but it's `terms_facet(self, term, name, size=None)`, so these two args should probably be reversed.  Also, this particular one is pretty common and already exists as `FormES().user_facet()`.
I think I changed the ordering at some point, so that's probably my fault.