message: Limit reaction sender tooltip to 6 people
  This limits the number of senders shown in the reaction sender tooltip shown
  when hovering a reaction to 6 people followed by "and N others" for the rest.
  Fixes
diff: @@ -21,6 +21,7 @@ import MatrixClientPeg from '../../../MatrixClientPeg';
  import sdk from '../../../index';
  import { unicodeToShort } from '../../../HtmlUtils';
  import { _t } from '../../../languageHandler';
  +import { formatCommaSeparatedList } from '../../../utils/FormattingUtils';
  export default class ReactionsRowButtonTooltip extends React.PureComponent {
  static propTypes = {
  @@ -54,7 +55,7 @@ export default class ReactionsRowButtonTooltip extends React.PureComponent {
  {
  reactors: () => {
  return <div className="mx_ReactionsRowButtonTooltip_senders">
  - {senders.join(", ")}
  + {formatCommaSeparatedList(senders, 6)}
  </div>;
  },
  reactedWith: (sub) => {
  