message: Restore read receipt animation from event to event
  This restores expected read receipt animation by always including the positioned
  parent of read receipts. I imagine there's something smarter we could be doing,
  but for now, at least least get back to expected behaviour.
  Fixes
diff: @@ -644,7 +644,18 @@ export default class EventTile extends React.Component<IProps, IState> {
  // return early if there are no read receipts
  if (!this.props.readReceipts || this.props.readReceipts.length === 0) {
  - return null;
  + // We currently must include `mx_EventTile_readAvatars` in the DOM
  + // of all events, as it is the positioned parent of the animated
  + // read receipts. We can't let it unmount when a receipt moves
  + // events, so for now we mount it for all events. With out it, the
  + // animation will start from the top of the timeline (because it
  + // lost its container).
  + // See also https://github.com/vector-im/element-web/issues/17561
  + return (
  + <div className="mx_EventTile_msgOption">
  + <span className="mx_EventTile_readAvatars" />
  + </div>
  + );
  }
  const ReadReceiptMarker = sdk.getComponent('rooms.ReadReceiptMarker');
  