If delivery_date is edited it doesn't show effective_date but delivery_date_store
In the purchase line form, delivery_date shows planned_date / effective_date of related moves if those exist; otherways it shows the purchase delivery_date. But in case that delivery_date was edited (actually we change delivery_date_store) it is not shown the planned_date / effective_date of related moves but the delivery_date_store. I think this is confusing to the user: Depending on whether the delivery_date was edited or not, he will see the expected date or the move effective_date. I think it will be better to show delivery_date instead of delivery_date_store if the purchase is processed.