New: [ task #498] part2

htdocs/comm/propal.php

htdocs/comm/propal/class/propal.class.php

htdocs/commande/class/commande.class.php

htdocs/commande/fiche.php

htdocs/compta/facture.php

htdocs/compta/facture/class/facture.class.php

htdocs/core/tpl/freeproductline_create.tpl.php

htdocs/install/mysql/migration/3.2.0-3.3.0.sql

htdocs/install/mysql/tables/llx_commandedet.sql

htdocs/install/mysql/tables/llx_facturedet.sql