erp5_workflow: make workflow script id editable.

bt5/erp5_workflow/SkinTemplateItem/portal_skins/erp5_workflow/WorkflowScript_view/my_id.xml

@@ -74,7 +74,7 @@
               <dictionary>
                 <item>
                     <key> <string>editable</string> </key>
-                    <value> <int>0</int> </value>
+                    <value> <int>1</int> </value>
                 </item>
                 <item>
                     <key> <string>field_id</string> </key>