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:     
      refreshAllSetsList();
      
      switchToSongMode();
      
      resetUi();
      
      setSizes();
    }
    
    
    void setSizes() {
      
      int h = window.innerHeight;
      _setContentContainer.style.height = "${h - 122}px";
      _allSongsContainer.style.height = "${h - 140}px";
      _allSetsList.style.height = "${h - 205}px";
      _songBodyText.style.height = "${h - 130}px";
      _songBodyInput.style.height = "${h - 130}px";
      
    }
  
    
    
    void bodyInputAutoGrow() {
      TextAreaElement el = _songBodyInput;
      
      if (el.scrollHeight > el.clientHeight) {
        el.style.height = "${el.scrollHeight}px";
      }  
    }
  
    void switchToSongMode() {
      _songView.style.display = "block";
      _setView.style.display = "none";
      
      _songToolBar.style.display = "block";
      _setToolBar.style.display = "none";
      
      _mode = OperatingMode.SONG;
      
      _songStyles.disabled = false;
      _setStyles.disabled = true;
    }
    
    void switchToSetMode() {
      _songView.style.display = "none";
      _setView.style.display = "block";
      
      _songToolBar.style.display = "none";
      _setToolBar.style.display = "block";
      
      _mode = OperatingMode.SET;
      
      _songStyles.disabled = true;
      _setStyles.disabled = false;
     }
    
    void toggleSidebar() {
  
negative.code:     _setSaveButton.onClick.listen((e) => saveSet());
      
      _setTitleInput = $("#setTitleInput")[0];
      _setTitleText = $("#setTitleText")[0];
      _setContentList = $("#setContentList")[0];
      _setContentContainer = $("#setContentContainer")[0];
  
  