without adding a strong dependency to purchase module.
Work can be set on the purchase line or purchase lines can be selected from the
work form view.
issue4951
review24351002
- rename cost_price to cost on work
- Use numeric type for function fields (cost_price on employee, cost and revenue on work)
- Isolate cost_price computation on employee and timesheet
- removed product on employee and timesheet line
- added cost (and cost history) on employee
- added product, list_price, revenue and cost_price on project.work