Show social icons horizontally on mobile

templates/footer.html

@@ -37,7 +37,7 @@
         {% endfor %}
       </aside>
       <p class="title is-5 mt-5">Kanäle und Netzwerke</p>
-      <aside class="columns is-centered is-vcentered is-multiline">
+      <aside class="columns is-centered is-vcentered is-multiline is-mobile">
         {% for social in config.extra.footer.social %}
           <div class="column is-one-third">
             <a href="{{social.link}}" rel="{{social.rel}}" class="icon is-large">