anchor.diff:  
       .btn-group.pull-right(data-bind='visible: apiMode() && apiUrl()', style='display:none')
         //- API mode, with URL - `Export font` button
  -      button.btn.btn-info.disabled(
  +      button.btn.btn-danger.disabled(
           data-on-click='api.export',
           data-bind='css: { disabled: !selectedCount() }'): strong
           i.icon-download(data-bind='visible: !saving()')
  
positive.code:         |  (
          span#selected-glyphs-count(data-bind='text: selectedCount()') 0
          | )
        button.btn.btn-info.disabled.dropdown-toggle(
          data-toggle='dropdown',
          data-bind='css: { disabled: !selectedCount() }'
          )
  
negative.code: 
      .btn-group.pull-right(data-bind='visible: apiMode() && !apiUrl()', style='display:none')
        //- API mode, without URL - `Save session` button
        button.btn.btn-danger.disabled(
          data-on-click='api.update',
          data-bind='css: {disabled: !selectedCount()}'): strong
          i.icon-download(data-bind='visible: !saving()')
  