message: allow logout dialog to be cancelled (can't see why not?)
diff: @@ -39,14 +39,15 @@ export default (props) => {
  const onFinished = (confirmed) => {
  if (confirmed) {
  dis.dispatch({action: 'logout'});
  + }
  + // close dialog
  if (props.onFinished) {
  props.onFinished();
  }
  - }
  };
  return (<QuestionDialog
  - hasCancelButton={false}
  + hasCancelButton={true}
  title={_t("Sign out")}
  description={<div>{description}</div>}
  button={_t("Sign out")}
  