message: Fix message load in Thread list
diff: @@ -1165,12 +1165,15 @@ export default class EventTile extends React.Component<IProps, IState> {
  || this.state.hover
  || this.state.actionBarFocused);
  + const room = MatrixClientPeg.get().getRoom(this.props.mxEvent.getRoomId());
  + const thread = room.findThreadForEvent?.(this.props.mxEvent);
  +
  // Thread panel shows the timestamp of the last reply in that thread
  const ts = this.props.tileShape !== TileShape.ThreadPanel
  ? this.props.mxEvent.getTs()
  - : this.props.mxEvent.getThread().lastReply.getTs();
  + : thread?.lastReply.getTs();
  - const timestamp = showTimestamp ?
  + const timestamp = showTimestamp && ts ?
  <MessageTimestamp
  showRelative={this.props.tileShape === TileShape.ThreadPanel}
  showTwelveHour={this.props.isTwelveHour}
  