Add backup listing

dashboard/src/utils.js

@@ -0,0 +1,24 @@
+
+// https://stackoverflow.com/questions/3665115/how-to-create-a-file-in-memory-for-user-to-download-but-not-through-server#18197341
+function download(filename, text) {
+  var element = document.createElement('a');
+  element.setAttribute('href', 'data:text/plain;charset=utf-8,' + encodeURIComponent(text));
+  element.setAttribute('download', filename);
+
+  element.style.display = 'none';
+  document.body.appendChild(element);
+
+  element.click();
+
+  document.body.removeChild(element);
+}
+
+// named exports
+export {
+  download,
+};
+
+// default export
+export default {
+  download,
+};