short-circuit drop Team-related votes
This PR has the effect of subsetting the short-circuit vote to the elected+appointed members of the AB + TAG, which I believe is correct, as TimBL and the CEO (and other Team contacts if any) have likely already had the chance to contribute to the Team recommendation for the short-circuit.
This PR is based on discussion in #793, and generalized beyond just TimBL.
If we accept this PR then we can close #793 without any of the suggested changes therein, as this PR solves the problem that motivated #793 and does so in a more general and desirable manner.
I still prefer #792, though I don't object to an additional change that removes the CEO from the short-circuit path.
I would not object to this, but I don't find it particularly compelling either.