anchor.diff:  
           // close panel function
           var close_panel = function() {
  -
  +          toggle.state('open-webgl');
             var $panel = $('.special-panel');
             if ($panel.length) {
               $('.special-panel').hide();
  
positive.code: 
          }, true);
  
          cozy.control.widget.toggle({
            region: 'top.toolbar.left',
            template: '<button class="button--sm" id="webgl" data-toggle="button" aria-label="3D Model">3D Model</button>',
            states: [{
  
negative.code:                 btn.state('open-webgl');
                }
              }],
          })
          toggle.addTo(reader);
          <% end %>
  
          // Database
  