message: add key to make React happier
diff: @@ -964,7 +964,7 @@ class CreationGrouper {
  summaryText = _t("%(creator)s created and configured the room.", { creator });
  }
  - ret.push(<NewRoomIntro />);
  + ret.push(<NewRoomIntro key="newroomintro" />);
  ret.push(
  <EventListSummary
  