message: Don't modify the size of the MessagePanel spinner
diff: @@ -770,7 +770,7 @@ export default class MessagePanel extends React.Component {
  topSpinner = <li key="_topSpinner"><Spinner /></li>;
  }
  if (this.props.forwardPaginating) {
  - bottomSpinner = <li key="_bottomSpinner"><Spinner w={20} h={20} /></li>;
  + bottomSpinner = <li key="_bottomSpinner"><Spinner /></li>;
  }
  const style = this.props.hidden ? { display: 'none' } : {};
  