Qual: Clean code to reduce nb of properties into classes

htdocs/boxes.php

htdocs/core/class/conf.class.php

htdocs/core/lib/fichinter.lib.php

htdocs/core/lib/functions.lib.php

htdocs/core/lib/invoice.lib.php

htdocs/core/lib/order.lib.php

htdocs/core/lib/prelevement.lib.php

htdocs/core/lib/propal.lib.php