Sale Timesheet Order Line no Update

This module adds a new field called "Default Sale Order Item" on the task form, next to the usual sale order item. When you create a new timesheet line on that task, this new field is used to fill in the sale order item, while the timesheets that already exist keep the item they had. This avoids rewriting history when you only want future timesheets to point to a different sale order line.

On the project form, the sale order item field now only offers service items that are not expenses and that belong to the project's customer (or to the project's sale order, depending on a setting). When you set or change the sale order item on a project, all its tasks get that value as their default sale order item automatically.

In Project settings you get two options: "Hide Sale Order Item in Task" to hide the original sale order item on tasks that already have a default one, and "Select items from different SO in project" to allow picking sale order items from other sale orders than the project's own.

On the timesheet lines inside a task, the sale order item column becomes editable, so users can adjust it directly, limited to service items of the same customer.