Make declarativeFunctionExecutor, booleanFunctionFactory, and actionFactory behaviors
Remove scenario.js' activeScenario local variable and fix bug in scenario.callMethod
Make use of sceneGetter behavior
Fix issue w/ triggers not getting cleared when user switches to new scenario via menu
Make video disappear for second user at same time it does for first user
Hide main menu for all clients when the game starts (until we make multiple logins work)
Get grid visibility to synchronize