Restore vanilla components

app/javascript/mastodon/features/ui/containers/notifications_container.js

@@ -0,0 +1,18 @@
+import { connect } from 'react-redux';
+import { NotificationStack } from 'react-notification';
+import { dismissAlert } from '../../../actions/alerts';
+import { getAlerts } from '../../../selectors';
+
+const mapStateToProps = state => ({
+  notifications: getAlerts(state),
+});
+
+const mapDispatchToProps = (dispatch) => {
+  return {
+    onDismiss: alert => {
+      dispatch(dismissAlert(alert));
+    },
+  };
+};
+
+export default connect(mapStateToProps, mapDispatchToProps)(NotificationStack);