On a system with a high volume of sales, the number of sale orders
displayed in the list view can become huge. This module allows to
archive Sale Orders that are in status Locked or Cancelled.

If a sale order is archived, it will be hidden from the sale orders list
view.

This module only depends on module sale, but it could be used in
combination with OCA module 'record_archiver' in order to automatically
archive old sale orders.
