Use MultiValue for product lead time

As discussed in https://discuss.tryton.org/t/product-leadtime-per-company/5193, the lead time of a product may depend on some contextual value like the warehouse.

assigned to @ced

added sales type::feature + 1 deleted label

added 1 deleted label and removed 1 deleted label

New review403411002 at https://codereview.tryton.org/403411002/#ps382511002

New changeset 5bd2ee43b530 by Cédric Krier in branch 'default':
Use MultiValue for product lead time
https://hg.tryton.org/modules/sale/rev/5bd2ee43b530

added 1 deleted label and removed 1 deleted label

closed

New changeset 1a53c0dca277 by Cédric Krier in branch 'default':
Use MultiValue for product lead time
https://hg.tryton.org/tryton-env/rev/1a53c0dca277