Fix export config and web status page

web/index.html

@@ -184,5 +184,9 @@ if (!window.isSecureContext) {
   </div>
 </div>
 
+<div class="hidden">
+  <a id="download"></a>
+</div>
+
 </body>
 </html>

web/index.js

@@ -582,7 +582,7 @@
     }
     function downloadData(data, name) {
         let url = "data:application/octet-stream," + encodeURIComponent(JSON.stringify(data, undefined, 2));
-        let target = document.getElementById('downloadXdr');
+        let target = document.getElementById('download');
         if (!target) return;
         target.setAttribute('href', url);
         target.setAttribute('download', name);