The legacy Comode codes resolve through the same dynamic resolver as a real
convenient resource, so Nano lands on the existing 'nano' preset (already
labelled WindFree) rather than on a 'windfree' value of its own -- the new
tests asserted the label instead of the value. 2Step had no catalog entry in
either language and would have surfaced as the raw code.
Also updates the existing five-percent-humidity test, which reached into the
descriptor's field/value_fn directly, to the rep_fn the fallback needs, and
covers the fallback itself.