r20115 - gnucash/trunk/src - Implement "Duplicate Invoice" feature, where a new invoice is created as a copy of an old one with new date and new ID.

[Christian Stimming]

Author: cstim
Date: 2011-01-16 16:09:53 -0500 (Sun, 16 Jan 2011)
New Revision: 20115
Trac: http://svn.gnucash.org/trac/changeset/20115

Modified:
   gnucash/trunk/src/business/business-gnome/dialog-invoice.c
   gnucash/trunk/src/business/business-gnome/dialog-invoice.h
   gnucash/trunk/src/engine/gncInvoice.c
Log:
Implement "Duplicate Invoice" feature, where a new invoice is created as a copy of an old one with new date and new ID.

This patch makes this feature available as button "Duplicate" in the search window.