#10 Print only last change

[Jorg Janke]

To modify e.g. a delivery note, you re-activate it and
change quantities, add/delete lines, etc.
When printing, two delivery notes are printed: the
cancellation and the new. The system should allow not
to print the cancel transaction (as for invoices), but
just the 'final' delivery note.

--
Check: number of pages printed if one delivery note
contains - and + quantities.

[Jorg Janke]

Logged In: YES
user_id=87038

Not possible to distinguish last change. If this occurs,
generate a summary invoice manually with the unwanted
(corrected) entries.