Hotfix 2.3.20

UPDATE: Space ValidateGameStateCommands from multiple clients in time to prevent concurrent execution & transfer via Steam Relay

FIX: Impossibility to empty hand when Perpetual / Shunting Circuit was grabbed from Manual Signal
FIX: References to grabbed & rebuilt offices/circuits & offices' contracts  were lost in multiplayer
FIX: Rusty Switch achievement & Locked switch note were not triggered