controller null check and optimized player grid data

Added data masking options and block options to alter those values. Now server operators can add some unknowns with massive signals at great distance.

Pulled thrustmonitor temporarily- was seeing some unspecified issue causing impossibly high sigs

Fixed thrustmonitor- old events weren't be deregistered.
Added server-side set of defaults for clients new to the mod (see wiki)

brief reversion

thrust checks changed to event based rolling peak

added option to suppress signal for NPCs

added option to suppress NPC shutdown