[MERGE] Account: name_get method on invoice updated=> if there is a number: use it...

[MERGE] Account: name_get method on invoice updated=> if there is a number: use it as name, if not use current name_get, with CI: invoice.name, and if empty it will be CI alone

bzr revid: mra@mra-laptop-20101110121305-emszew8zt6k3s5sk