[FIX] mrp: display info text on work orders view
[FIX] mrp: display info text on work orders view

When seeing the work orders view, it would display an empty black box instead of
the proper message.

The message is not displaed since creation is deactivated.

opw 1839001

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo