add print qr code page

lib/pages/carton/carton_editor.dart

@@ -310,7 +310,7 @@ class _CartonEditorState extends State<CartonEditor> {
               CupertinoPageRoute(builder: (context) => CartonInfo(carton: c)),
             );
           },
-          child: CartonRow(box: c));
+          child: CartonRow(carton: c));
     }).toList();
   }
 }