Filter groups for eventsource

On the windows system event log eventsource, it would be good if you had filter groups in the filters section as you currently have to create an eventsource for each device group. I think that it would be good to have a default filtering group that will apply to all groups even if a group has its own group created. For example, if filter group "default" was the only group, it will apply to every device group but if I then added a filter group named "A Group" this would not overwrite the default filter group, only add onto the rules. Where you see the filter rules table now, that could show a list of groups instead, when you click on the group it could open a window which shows the alert rules for that group. This would be very useful.