Cleanup :

- I made the form id different between the front and the back office
- I renamed a few files to use the same convention (create / update)

templates/admin/default/customers.html

@@ -161,7 +161,7 @@
     {* Adding a new Category *}
 
 
-    {form name="thelia.customer.creation"}
+    {form name="thelia.admin.customer.create"}
 
         {* Capture the dialog body, to pass it to the generic dialog *}
         {capture "customer_creation_dialog"}