fix #3292, NONE string in hyperdrive class

fixes #3292.

ShipInfo uses `HYPERDRIVE..":"` but ShipMarket uses `HYPERDRIVE_FITTED` for the exact same purpose. I'm in the mood to throw out one of them. If we keep the latter of the two, then since it evals to "Hyperdrive fitted:" another colonoscopy (#2682) is needed. :smile:

Code OK @laarmen?