The event-label for restartPollingInterface in eventconf.xml should be changed to match the rest. It says "OpeNMS" but should say "OpenNMS" so that it will be grouped up with the rest of the 'OpenNMS-defined node events' in the Web UI.
<event-label>OpeNMS-defined node event: restartPollingInterface</event-label>
I'm just scrutinizing things now, but it could also be moved down in eventconf.xml so that it's with the rest of the node events (and the indentation could be corrected, too). Thanks!