Operating Unit in MRP

This module links manufacturing orders to an Operating Unit, a way of separating data between different parts of a company.

• On a manufacturing order, a new Operating Unit field appears in the form (under the Miscellaneous tab), in the list view and in the search filters. It is only shown to users who have the multi operating unit setting enabled.
• The field is filled automatically with the user's default operating unit when a manufacturing order is created, and it is read-only.
• When a manufacturing order is generated automatically by a reordering rule, the operating unit of that rule is copied onto the order.
• Changing the operating unit on a draft or confirmed order automatically switches the operation type to the one belonging to the warehouse of that operating unit.
• A check prevents saving an order when its operating unit does not match the operating unit of the source (raw materials) or destination (finished product) locations.
• A global security rule limits visibility: users can only read manufacturing orders whose operating unit is one of theirs, or orders with no operating unit at all.

The module touches mrp.production and stock.rule, and adds the Operating Unit field to the manufacturing order screens and filters.