data protection: translate workflow messages when displayed

If we call Base_translateString before storing the message in the
history, the message will be translated when this action is used and
stored as translated using the language of the user executing this action.

The proper way is to store a message in history, so that it is rendered
when displayed.

bt5/erp5_data_protection/SkinTemplateItem/portal_skins/erp5_data_protection/DataProtectionRequest_eraseSomeOriginalData.py

+from Products.ERP5Type.Message import translateString
 portal = context.getPortalObject()
 selection_name = 'data_protection_request_erase_data_selection'
 property_id_list = portal.portal_selections.getSelectionCheckedUidsFor(selection_name)
@@ -9,7 +10,7 @@ clean_up_done = False
 # First: Purge workflow history comments
 if flush_worklfow_history_comment:
   document_to_cleanup.Base_purgeWorkflowHistoryCommentList()
-  edit_message = portal.Base_translateString('Workflow comments deleted by data protection manager')
+  edit_message = translateString('Workflow comments deleted by data protection manager')
   portal.portal_workflow.doActionFor(document_to_cleanup, 'edit_action', comment=edit_message)
   clean_up_done = True
 
@@ -18,7 +19,7 @@ if property_id_list:
   edit_kw = {}
   [edit_kw.update({property_id: None}) for property_id in property_id_list]
 
-  edit_message = portal.Base_translateString('Properties deleted by data protection manager: ${items}',
+  edit_message = translateString('Properties deleted by data protection manager: ${items}',
                                              mapping={'items': ', '.join(property_id_list)})
   portal.portal_workflow.doActionFor(document_to_cleanup, 'edit_action', comment=edit_message)