[FIX] project_timesheet: task progress is no timesheet
[FIX] project_timesheet: task progress is no timesheet

If a project task with no linked timesheet is set to "Done", the working
time progress stays to zero.

opw-681622

microcom/odoo,Elico-Corp/odoo_OCB,hip-odoo/odoo,bplancher/odoo,storm-computers/odoo,laslabs/odoo,hip-odoo/odoo,hip-odoo/odoo,ygol/odoo,dfang/odoo,microcom/odoo,dfang/odoo,storm-computers/odoo,microcom/odoo,storm-computers/odoo,bplancher/odoo,laslabs/odoo,laslabs/odoo,storm-computers/odoo,dfang/odoo,microcom/odoo,ygol/odoo,bplancher/odoo,Elico-Corp/odoo_OCB,ygol/odoo,hip-odoo/odoo,hip-odoo/odoo,laslabs/odoo,ygol/odoo,bplancher/odoo,laslabs/odoo,dfang/odoo,bplancher/odoo,bplancher/odoo,storm-computers/odoo,laslabs/odoo,ygol/odoo,Elico-Corp/odoo_OCB,microcom/odoo,dfang/odoo,ygol/odoo,storm-computers/odoo,ygol/odoo,dfang/odoo,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,Elico-Corp/odoo_OCB,microcom/odoo,hip-odoo/odoo