Fix: We must use the long label for payment condition on PDF documents

htdocs/commande/commande.class.php

htdocs/compta/facture/facture-rec.class.php

htdocs/facture.class.php

htdocs/includes/modules/commande/pdf_einstein.modules.php

htdocs/includes/modules/facture/pdf_crabe.modules.php

htdocs/includes/modules/facture/pdf_oursin.modules.php

htdocs/includes/modules/propale/pdf_propale_azur.modules.php

htdocs/propal.class.php