vcenter related media items

templates/shortcodes/teckids_related.html

 <section class="section">
   <h2 class="title">Darum geht es bei Teckids</h2>
-  <div class="columns">
+  <div class="columns is-vcentered">
     <div class="column is-two-thirds">
       {{body|markdown|safe}}
     </div>