anchor.diff:    //- - - - - - - - - - - - - - - - - - - - - - - - -
     cd.createTip($button, tip);
     $button.click(() => openForkDialog());
  +
  +  // NB: logically there are two other possibilities:
  +  // - In a group, you could fork a new avatar (in that group)
  +  // - A "Deep-Fork" where the new session has the full git
  +  //   history of the forked-from session.
  +  // At present, there is no support for these.
  +
     $('.individual', $fork).click(() => fork('kata'));
     $('.group',      $fork).click(() => fork('group'));
   
  
positive.code:     });
    };
  
    //- - - - - - - - - - - - - - - - - - - - - - - - -
    const error = (request, status, thrown) => {
      const message = [
        request.responseText,
  
negative.code:     "traffic-light's files"
    ].join('<br/>');
  
    const openForkDialog = () => {
      const xPos = $button.offset().left;
      const yPos = $button.offset().top + 30;
  