French translation finally gets some love

some more themes updated, note comments on brick

avoid uninitialised pointer. thanks to dead.mazayus

nil check

added also splash and droplets to sd and refactored theme.cfg, not all themes updated

Close branch

add a couple of variables to speed up UID lookups. Based on the assumption new visual gears and gears will tend to be at the end of the list. Set them on successful lookup or script gear creation, clear on delete. Oh also pick up a couple of TrevInc's translation changes