restore isWorkflowActionAddable because of new erp5diff which is able to detect moved nodes

git-svn-id: https://svn.erp5.org/repos/public/erp5/trunk@35824 20353a03-c40f-0410-a6d1-a30d3c3de9de

product/ERP5SyncML/Conduit/ERP5Conduit.py

@@ -918,8 +918,6 @@ class ERP5Conduit(XMLSyncUtilsMixin):
     instead go to a conflict state.
     """
     # We first test if the status in not already inside the workflow_history
-    return 1
-    # XXX Disable for now
     wf_history = object.workflow_history
     if wf_history.has_key(wf_id):
       action_list = wf_history[wf_id]