Trad:  Fix: A better fix for status/list of orders.

There was a confusion because of bad translation key StatusOrderToBill
that in fact mean "StatusOrderDelivered".
Merge pull request #754 from simnandez/3.3

Trad:  Fix: A better fix for status/list of orders.
various fixes on margin :
- fix on sortorder
- fix for credit notes
- fix for total
use ifsql function
Merge pull request #756 from cbattarel/3.3

various fixes on margin :
remove experimental commissions module
Merge pull request #757 from cbattarel/3.3

remove experimental commissions module
fix getting buying price when creating automatically an order from a proposal (with first option activated in workflow module)
Merge pull request #761 from cbattarel/3.3

fix getting buying price when creating automatically an order from a proposal
Merge remote-tracking branch 'origin/3.3' into develop