message: Use the correct userId when displaying who redacted a message
diff: @@ -25,7 +25,9 @@ module.exports = React.createClass({
  render: function() {
  let tooltip = _t("Removed or unknown message type");
  if (this.props.mxEvent.isRedacted()) {
  - tooltip = _t("Message removed by %(userId)s", {userId: this.props.mxEvent.getSender()});
  + tooltip = _t("Message removed by %(userId)s", {
  + userId: this.props.mxEvent.getUnsigned().redacted_because.sender,
  + });
  }
  const text = this.props.mxEvent.getContent().body;
  