add ui

ui/components/dropdown/dropdown.page.js

@@ -0,0 +1,8 @@
+import { AutoloadPage } from 'vj/misc/PageLoader';
+import Dropdown from './Dropdown';
+
+const dropdownPage = new AutoloadPage('dropdownPage', () => {
+  Dropdown.registerLifeCycleHooks();
+});
+
+export default dropdownPage;