bzr revid: christophe@tinyerp.com-20081103191856-jhcivvwb16fvz2os
->add a button and a transition from paid to open + a pop-up of confirmation if the button is pressed(inv must be unreconciled) bzr revid: mra@tinyerp.com-20080826062732-sfg4u4jshoi3d2n0