[bug] GameEventListeners should be wrapped in a try/catch block

If some function throws an unhandled exception from a GameEvent being raised, it shouldn't stop all the other functions from listening/responding to it

changed the description

added To Do label

assigned to @erheine

added Doing label and removed To Do label

mentioned in merge request !2 (merged)

closed via merge request !2 (merged)

mentioned in commit 4d39151b