Hide the drawer/modal when constructing all pages

Might be better to do this on config... also extract it into a parent
"Page" component

js/forum/src/components/NotificationsPage.js

@@ -12,6 +12,7 @@ export default class NotificationsPage extends Component {
     app.current = this;
     app.history.push('notifications');
     app.drawer.hide();
+    app.modal.close();
   }
 
   view() {