Bugfix : reports of error from one client. Would get an error on spares sale when trying to print invoice.  Reprint was generally okay.  Not sure precise root caus. It was connected to changes in last version of c9, with printing of voucher details on invoices.  The way the code was was by design fragile. Rewrote that section of code using a simpler and more reliable approach.

Select Estimate: memorize column widths for standard estimate tab