refactored javascript to ES6 classes (#759)

assets/js/plugins/KimaiJqueryPluginInitializer.js

@@ -0,0 +1,24 @@
+/*
+ * This file is part of the Kimai time-tracking app.
+ *
+ * For the full copyright and license information, please view the LICENSE
+ * file that was distributed with this source code.
+ */
+
+/*!
+ * [KIMAI] KimaiJqueryPluginInitializer: initialize jQuery plugins
+ */
+
+import jQuery from 'jquery';
+import KimaiPlugin from '../KimaiPlugin';
+
+export default class KimaiJqueryPluginInitializer extends KimaiPlugin {
+
+    init() {
+        // activate the dropdown functionality
+        jQuery('.dropdown-toggle').dropdown();
+        // activate the tooltip functionality
+        jQuery('[data-toggle="tooltip"]').tooltip();
+    }
+
+}