Allow line items numbers to display on change orders

When building the SOV, all the original items have a line item number, which we can use as reference, but all change orders just display 'CO', regardless of how many change orders or change order line items their are. Additionally, when change orders go against the exisiting line item, Trimble creates a new line that doesn't stay grouped with the existing line. This makes it more difficult to track lines on SOV's between the owner and the sub, so I would request the ability to number change order line items the same way we can include original SOV line item numbers.