- Issue: Edit sale.order form view, add new line, change product who have
taxes and click quickly on save (with slow network) => error message.
Because some deferreds are lost.
- reduce number of reads and onchange for x2m widgets
- remove before_save method and use commit_value (the issue was that if the
before_save and the change trigger an onchange, the onchange deferred is not
checked before saving the content.
Christophe Matthieu
feeac2a4f1