Provide a translation of the titleon the fatal error dialog pop-up

modules/server_add/views/server_add_tree_dialog.html.php

@@ -1,4 +1,7 @@
 <?php defined("SYSPATH") or die("No direct script access.") ?>
+<script>
+  var FATAL_ERROR = "<?= t("Fatal Error") ?>";
+</script>
 <?= html::script("modules/server_add/js/server_add.js"); ?>
 <div id="gServerAdd">
   <h1 style="display: none;"><?= sprintf(t("Add Photos to '%s'"), $album_title) ?></h1>