Move message handler cleanup to WebClient destructor
Move message handler cleanup to WebClient destructor

rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine,rsredsq/AtomicGameEngine