View source for Past Events/Formats

<div id="formats" class="d-flex flex-wrap event-filter-group"><!--

--><span class="clear-filter float-right" style="display:none"></span><!--

--><h4 class="collapsed moha-button" data-toggle="collapse" data-target="#event-filter-format" aria-expanded="false">Format</h4>
<div id="event-filter-format" class="pb-4 event-filters collapse">{{#arraydefine: formats|{{#ask: [[Category:Events]]|?Event format |mainlabel=- |headers=hide |format=array |sep=; |manysep=; |limit=5000 |searchlabel=}}|;|unique, sort=asc}}<!--

-->{{#arrayprint: formats
  |
  |@@@
  |{{#widget: input|type=checkbox|name=format|value=@@@|class=d-flex m-1}}
}}</div>
</div>