New feature flag with ability to migrate GV1 groups

ts/state/roots/createGroupV1MigrationModal.tsx

@@ -0,0 +1,28 @@
+// Copyright 2020 Signal Messenger, LLC
+// SPDX-License-Identifier: AGPL-3.0-only
+
+import React from 'react';
+import { Provider } from 'react-redux';
+
+import { Store } from 'redux';
+
+import { ModalHost } from '../../components/ModalHost';
+import {
+  SmartGroupV1MigrationDialog,
+  PropsType,
+} from '../smart/GroupV1MigrationDialog';
+
+export const createGroupV1MigrationModal = (
+  store: Store,
+  props: PropsType
+): React.ReactElement => {
+  const { onClose } = props;
+
+  return (
+    <Provider store={store}>
+      <ModalHost onClose={onClose}>
+        <SmartGroupV1MigrationDialog {...props} />
+      </ModalHost>
+    </Provider>
+  );
+};