[FIX] mrp: hide button "continue production" on done WO
[FIX] mrp: hide button "continue production" on done WO

previously button "continue production" was visible on work orders which
were in done state. Which was not ideal. Fixed it by hiding it.

Task-2003916
ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo