Changing alert back to a focus and fixing tests

app/assets/javascripts/fileUpload.js

@@ -10,11 +10,13 @@ function announceUploadStatusFromElement() {
   if (message) {
     srRegion.textContent = '';
     setTimeout(() => {
-      srRegion.textContent = message;
-    }, 50);
+      srRegion.textContent = message + '\u00A0'; // add a non-breaking space
+      srRegion.focus(); // Optional
+    }, 300);
   }
 }
 
+
 // Exported for use in tests
 function initUploadStatusAnnouncer() {
   document.addEventListener('DOMContentLoaded', () => {

app/templates/base.html

@@ -14,6 +14,7 @@
     <div id="upload-status-live"
       class="usa-sr-only"
       aria-live="assertive"
+      tabindex="-1"
       role="status">
     </div>
     <script nonce="{{ csp_nonce() }}">document.body.className = ((document.body.className) ? document.body.className + ' js-enabled' : 'js-enabled');</script>