Do not expect to find the template field in the first field library of the skin selection.

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35769 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5Form/ProxyField.py

@@ -574,10 +574,7 @@ class ProxyField(ZMIField):
     """
     proxy_field = self.getTemplateField()
     if proxy_field:
-      url='/'.join((self.absolute_url(),
-                    self.get_value('form_id'),
-                    self.get_value('field_id'),
-                    'manage_main'))
+      url = "%s/manage_main" % proxy_field.absolute_url() 
       REQUEST.RESPONSE.redirect(url)
     else:
       # FIXME: should show some error message