message: Disable creating polls within threads
diff: @@ -337,6 +337,9 @@ class PollButton extends React.PureComponent<IPollButtonProps> {
  };
  render() {
  + // do not allow sending polls within threads at this time
  + if (this.props.relation?.rel_type === RelationType.Thread) return null;
  +
  return (
  <CollapsibleButton
  className="mx_MessageComposer_button mx_MessageComposer_poll"
  