Fix "download results" support for Products

it is not enabled by default, but still should work when it is

tailbone/templates/products/index.mako

@@ -76,6 +76,7 @@
 </%def>
 
 <%def name="grid_tools()">
+  ${parent.grid_tools()}
   % if label_profiles and request.has_perm('products.print_labels'):
       <table class="label-printing">
         <thead>

tailbone/views/products.py

@@ -732,6 +732,16 @@ class ProductView(MasterView):
 
         return row
 
+    def download_results_normalize(self, product, fields, **kwargs):
+        data = super(ProductView, self).download_results_normalize(
+            product, fields, **kwargs)
+
+        if 'upc' in data:
+            if isinstance(data['upc'], GPC):
+                data['upc'] = six.text_type(data['upc'])
+
+        return data
+
     def get_instance(self):
         key = self.request.matchdict['uuid']
         product = Session.query(model.Product).get(key)