anchor.diff:        _songBodyText.text = _songBodyInput.value;
         
         refreshAllSongsList();
  +      _songEditMode = false;
         
  -      _songTitle.style.display = "block";
  -      _songBodyText.style.display = "block";
  -      _songTitleInput.style.display = "none";
  -      _songBodyInput.style.display = "none";
  -     
  -      _sidebarToggle.disabled = false;
  -      _songEditButton.disabled = false;
  -      _songNewButton.disabled = false;
  -      
  -      _songCancelButton.disabled = true;
  -      _songSaveButton.disabled = true;
  -    
  +      updateUiState();    
         
       });
       
  
positive.code:     _songTitle.text = s.title;
      s.readText((String text) {
        _songBodyText.text = text;
        _songEditButton.disabled = false;
        _songDeleteButton.disabled = false;
        _songService.activeSong = s;
        sidebarVisible = false;
        window.scrollTo(0, 0);
      });
    }
  
negative.code:   FsService _fsService;
   
    OperatingMode _mode;
    bool _songEditMode = false;
    
    ButtonElement _sidebarToggle;
    DivElement _sidebarContainer;
  