Fixed use of setTimeout to avoid errors when dispatching custom actions

[abrel]

The implementation of setTimeout in utils/events is incorrect and then leading to some errors when trying to use advanced handlers.

Passing a function to setTimeout solves this issue.

Below is an example of error with the current implementation:

Uncaught TypeError: callback.apply is not a function
at new_callback (http://localhost:8000/webpack:/~/longjohn/dist/longjohn.js:188:1)

at global.setTimeout (http://localhost:8000/webpack:/~/longjohn/dist/longjohn.js:289:1)
at http://localhost:8000/webpack:/~/smooch/lib/utils/events.js:69:1
at Set.forEach (native)
at Set.<anonymous> (http://localhost:8000/webpack:/~/core-js/library/modules/_collection.js:40:1)
at Observable.trigger (http://localhost:8000/webpack:/~/smooch/lib/utils/events.js:68:1)
at openWidget (http://localhost:8000/webpack:/~/smooch/lib/services/app-service.js:54:1)
at MessengerButtonComponent._this2.onClick (http://localhost:8000/webpack:/~/smooch/lib/components/messenger-button.js:101:1)
at Object.ReactErrorUtils.invokeGuardedCallback (http://localhost:8000/webpack:/~/react-dom/lib/ReactErrorUtils.js:70:1)
at executeDispatch (http://localhost:8000/webpack:/~/react-dom/lib/EventPluginUtils.js:85:1)
at Object.executeDispatchesInOrder (http://localhost:8000/webpack:/~/react-dom/lib/EventPluginUtils.js:108:1)
at executeDispatchesAndRelease (http://localhost:8000/webpack:/~/react-dom/lib/EventPluginHub.js:43:1)
at executeDispatchesAndReleaseTopLevel (http://localhost:8000/webpack:/~/react-dom/lib/EventPluginHub.js:54:1)
at Array.forEach (native)
at forEachAccumulated (http://localhost:8000/webpack:/~/react-dom/lib/forEachAccumulated.js:24:1)
at Object.processEventQueue (http://localhost:8000/webpack:/~/react-dom/lib/EventPluginHub.js:230:1)
at runEventQueueInBatch (http://localhost:8000/webpack:/~/react-dom/lib/ReactEventEmitterMixin.js:17:1)

[lemieux]

Thanks for this and well done! This setTimeout was pretty much useless without a wrapping function. We'll merge and deploy it tomorrow.