pdm: move "Reference" to right group on Transformation view

for consistency with Trade Condition views

bt5/erp5_pdm/SkinTemplateItem/portal_skins/erp5_pdm/Transformation_view.xml

@@ -112,7 +112,6 @@
                     <value>
                       <list>
                         <string>my_title</string>
-                        <string>my_reference</string>
                         <string>my_resource_title</string>
                         <string>my_template_transformation_title_list</string>
                       </list>
@@ -122,6 +121,7 @@
                     <key> <string>right</string> </key>
                     <value>
                       <list>
+                        <string>my_reference</string>
                         <string>my_version</string>
                         <string>my_variation_base_category_list</string>
                         <string>my_variation_category_list</string>