In this pr, we have improved the l10n_hu localization by adding a Tax rounding
(global) by default.
Also, a lot of localization will need a delivery date on invoices. We added a
field in account that can be overridden if needed. In this pr, we did an
override on l10n_sa and l10n_hu.
When creating a sale order and that the effective date is fill, we take this
value for the delivery date.
The delivery date field will always be displayed in the other info tab, and if
there is a delivery data, the field is also display in the header of the form
view. Exception for l10n_sa and l10n_hu where the delivery date is always
present.
Also for l10n_sa company there was a problem with the vat number, it was not in
the right format.
Task-id: 3191530
Part-of: odoo/odoo#116643
det
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