erp5_production_planning: set related url property after apply

bt5/erp5_production_planning/WorkflowTemplateItem/portal_workflow/production_planning_interaction_workflow/scripts/ProductionPlanning_applyProductionPlanningChanges.py

@@ -54,7 +54,10 @@ for cell_keys in production_planning.getCellKeys():
           portal_type='Production Order Line',
           resource_uid = resource_uid,
           quantity = cell_quantity)
-        cell.edit(specialise_value = production_order_line)
+        cell.edit(
+          specialise_value = production_order_line,
+          related_url = production_order.getAbsoluteUrl()
+        )
         portal.portal_workflow.doActionFor(
           production_order_line,
           "edit_action",