message: Close potential WS connection on unmount
diff: @@ -51,6 +51,10 @@ export class TimerView extends React.Component<Props, State> {
  };
  }
  + componentWillUnmount() {
  + this.connection?.close();
  + }
  +
  public render() {
  const renderedView = this.renderView();
  if (this.props.renderWithSidebar) {
  