show feedback spinner for log in process

core/js/login.js

@@ -0,0 +1,24 @@
+/**
+ * Copyright (c) 2015
+ *  Vincent Petry <pvince81@owncloud.com>
+ *  Jan-Christoph Borchardt, http://jancborchardt.net
+ * This file is licensed under the Affero General Public License version 3 or later.
+ * See the COPYING-README file.
+ */
+
+/**
+ * @namespace
+ * @memberOf OC
+ */
+OC.Login = _.extend(OC.Login || {}, {
+	onLogin: function () {
+		$('#submit')
+			.removeClass('icon-confirm')
+			.addClass('icon-loading-small')
+			.css('opacity', '1');
+		return true;
+	}
+});
+$(document).ready(function() {
+	$('form[name=login]').submit(OC.Login.onLogin);
+});

core/templates/login.php

@@ -3,7 +3,8 @@
 vendor_script('jsTimezoneDetect/jstz');
 script('core', [
 	'visitortimezone',
-	'lostpassword'
+	'lostpassword',
+	'login'
 ]);
 ?>