[IMP] stock: allow to skip next activity
[IMP] stock: allow to skip next activity

Due to subcontracting. Some documents are hidden from the users since
they are there to ease technicaly. However they are linked to useful
documents and we want to avoid to log an activity on them.
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo