related events box in alarm detail shows all events when alarm has no node / interface / service / ifindex

@mfuhrmann posted https://opennms.discourse.group/t/how-do-related-events-work. Upon investigation it was found that related events are defined as events with the same node ID, interface, service, and ifIndex when any of those are defined. However, the event that generated the alarm had no node, interface, service or index attached to it, so the query had no filters and therefore returned a list of events that were instead extremely unrelated.

Some discussion ensued in Mattermost, and the consensus was the that this is a bug where the fix is that when no filters exist the list should be empty.