Handling of event addons

app/Domains/Event/Controllers/DetailsController.php

@@ -224,6 +224,9 @@ class DetailsController extends CommonController {
             case 'by-participation-option':
                 $participants = $this->eventParticipants->groupByParticipationOption($event, $request);
                 break;
+            case 'by-addon':
+                $participants = $this->eventParticipants->groupByAddon($event, $request);
+                break;
             case 'signed-off':
                 $participants = $this->eventParticipants->getSignedOffParticipants($event, $request);
                 break;