anchor.diff:  
     canvas.on('object:selected', function(options){
       $("#remove-selected").css("display", "initial");
  -    if(options.target.element_type_id == 11) {
  +    $("#shelfData").css("display", "none");
  +    if(options.target.element_type_name == "Shelf") {
         $("#shelfData").css("display", "initial");
       }
   
  
positive.code:   });
  
    canvas.on('selection:cleared', function(options){
      $("#remove-selected").css("display", "none");
      $("#shelfData").css("display", "none");
    });
  
negative.code:           floor: <%= element.floor %>,
            element_type_id: <%= element.element_type_id %>,
            modified: true,
            id: <%= element.id %>,
            element_type_name: "Wall"
          })
          .setCoords();
  
  