Resolve #3166166 "Unable to restore"

Closes #3166166

src/Controller/BackupController.php

@@ -119,6 +119,8 @@ class BackupController extends ControllerBase {
     $backups = $destination->queryFiles([], $order['sql'], $php_sort, $count);
 
     foreach ($backups as $backup_id => $backup) {
+      $backup_id = $destination->normalizeId($backup_id);
+
       $rows[] = [
         'data' => [
           // Cells.