Improve listener queuing efficiency by only queuing certain entity types and event types

At present the listener queues are equally updated with every event type on every entity type. All of my listeners check the incomming entity type and reject unwanted queue items. It would be better to only queue the wanted types in the first place.

It would be better if when a listener is configured a filter can be defined for

* The entity type ids that apply e.g. "Item,ChannelNode"
* The event types that apply "Created,Updated"

This would reduce the persistences of new queued events and overall reduce CPU burn.