message: fix: show decrypted source on EditHistory -> ViewSource
  pass correct props to the component
diff: @@ -77,6 +77,8 @@ export default class EditHistoryMessage extends React.PureComponent {
  roomId: this.props.mxEvent.getRoomId(),
  eventId: this.props.mxEvent.getId(),
  content: this.props.mxEvent.event,
  + isEncrypted: this.props.mxEvent.getType() !== this.props.mxEvent.getWireType(),
  + decryptedContent: this.props.mxEvent._clearEvent,
  }, 'mx_Dialog_viewsource');
  };
  