PerhapsIdea: We give up on trying to use using tor-launcher on Whonix-Gateway. (T118) and only make use of latest Tor and pluggable transports?
A simpler approach:
* We could download TBB using #tb-updater on Whonix-Gateway.
* That way we could use the Tor and the pluggable transports shipped by TBB on Whonix-Gateway.