View source for Past Events/Medium

<div id="mediums" class="d-flex flex-wrap event-filter-group">
<h4 class="collapsed" data-toggle="collapse" data-target="#event-filter-medium" aria-expanded="false">Medium <i class="fa far chevron"></i></h4>
<div id="event-filter-medium" class="collapsed event-filters">{{#arraydefine: mediums|{{#ask: [[Category:Events]]|?Event medium |mainlabel=- |headers=hide |format=array |sep=; |manysep=; |limit=5000 |searchlabel=}}|;|unique, sort=asc}}<!--

-->{{#arrayprint: mediums
  |
  |@@@
  |{{#widget: input|type=checkbox|name=medium|value=@@@|class=d-inline-block m-1 text-nowrap nowrap}}
}}</div>
</div>