fix unused id in test

public/index.html

@@ -113,7 +113,7 @@
       <p id="storage-cleanup-status" class="storage-cleanup-status" hidden></p>
 
       <progress id="bootstrap-progress" class="bootstrap-state-model" max="7" value="0" hidden></progress>
-      <ol id="bootstrap-steps" class="bootstrap-state-model" hidden>
+      <ol class="bootstrap-state-model" hidden>
         <li data-step="storage">Lokalen Speicher prüfen</li>
         <li data-step="jquery">jQuery laden</li>
         <li data-step="jquery-ui">jQuery UI laden</li>

public/js/bootstrap-loader.js

@@ -135,7 +135,12 @@
     setStatusText('Vorbereitung abgeschlossen.');
     actionStatus?.classList.add('is-leaving');
     enter.hidden = false;
-    globalThis.requestAnimationFrame(() => enter.classList.add('is-visible'));
+    const showEnter = () => enter.classList.add('is-visible');
+    if (typeof globalThis.requestAnimationFrame === 'function') {
+      globalThis.requestAnimationFrame(showEnter);
+    } else {
+      globalThis.setTimeout(showEnter, 0);
+    }
     globalThis.setTimeout(() => {
       if (actionStatus) actionStatus.hidden = true;
     }, 220);