slapos_panel: translate string

master/bt5/slapos_panel/SkinTemplateItem/portal_skins/slapos_panel/Project_addSlapOSAllocationSupply.py

+from Products.ERP5Type.Message import translateString
+
 portal = context.getPortalObject()
 project = context
 
@@ -31,7 +33,5 @@ for sql_software_product in software_product_list:
   )
 
 return allocation_supply.Base_redirect(
-  message='New Allocation Supply created.',
-  keep_items={
-  }
+  keep_items={'portal_status_message': translateString('New Allocation Supply created.')}
 )