Maxi debug and enhancement of module batch.

...compta/sociales/class/paymentsocialcontribution.class.php

htdocs/core/class/events.class.php

htdocs/core/js/lib_batch.js

htdocs/fourn/class/fournisseur.commande.class.php

htdocs/fourn/commande/dispatch.php

htdocs/install/mysql/migration/3.7.0-3.8.0.sql

...nstall/mysql/tables/llx_commande_fournisseur_dispatch.sql

htdocs/langs/en_US/errors.lang

htdocs/langs/en_US/productbatch.lang

htdocs/langs/en_US/stocks.lang

htdocs/langs/fr_FR/stocks.lang

htdocs/product/class/product.class.php

htdocs/product/class/productbatch.class.php

htdocs/product/stock/class/entrepot.class.php

htdocs/product/stock/class/mouvementstock.class.php

htdocs/product/stock/mouvement.php

htdocs/product/stock/product.php