Comment 8 for bug 724525

Hello m.karrer,
thanks for reporting such a nice improvement,
unfortunately there is no way to fix it in current trunk version, as its relates some checking in purchase for sale and we don't have direct dependencies between sale and purchase,
This can be done by making a new module in extra-addons, that depends of sale and purchase and adds the extra improvements,
hope this helps you,
I am making this as won't fix as we can not adapt this change for trunk development,
for your suggestion about "Manual workflow" you can report another bug for the shake of clarity,
Thanks for understanding