Add Navigation Arrow and simplify static page

public/js/bootstrap-loader.js

@@ -71,7 +71,7 @@
       initializeJqueryUi();
       mark('jquery-ui', 'done');
 
-      for (const module of ['config', 'api-client', 'distance', 'geolocation', 'slideshow', 'audio-player', 'app']) {
+      for (const module of ['config', 'api-client', 'distance', 'geolocation', 'orientation', 'slideshow', 'audio-player', 'app']) {
         await loadScript(`js/${module}.js`, () => Boolean(window.Wegwichtel));
       }
       mark('modules', 'done');
@@ -90,6 +90,14 @@
     }
   }
 
-  retry.addEventListener('click', () => location.reload());
+  function retryBoot(event) {
+    if (event.type === 'keydown' && event.key !== 'Enter' && event.key !== ' ') return;
+    if (event.type === 'pointerup' && event.pointerType === 'mouse' && event.button !== 0) return;
+    event.preventDefault();
+    location.reload();
+  }
+
+  retry.addEventListener('pointerup', retryBoot);
+  retry.addEventListener('keydown', retryBoot);
   boot();
 }());