Feature/purple a11y menu

lars und anvi fanden das lila menu chic, wird jetzt integreirt

public/index.html

@@ -17,7 +17,7 @@
     <header>
       <div class="js" lang="en" id="accessibility-options">
         <button type="button">
-          Accessibility Options
+          Accessibility&nbsp;Options
         </button>
         <fieldset class="display-none" id="font-selection">
           <legend class="font-Ubuntu">Font</legend>