Make footer nicer on smaller screens

_includes/footer.html

@@ -26,7 +26,7 @@
         </a>
         
         <a href="https://gl.kwarc.info/kwarc/website/#repository-holding-the-sources-of-the-KWARC.info-website" title="How to edit" class="waves-effect waves-teal btn-flat">
-          How to edit
+            <i class="fa fa-question-circle" aria-hidden="true"></i> How to edit
         </a>
       </div>