Merge remote-tracking branch 'origin/3.7' into develop

dev/detectduplicatelangkey.sh

dev/detectnotabfiles.sh

dev/fixduplicatelangkey.sh

dev/optimize_images.sh

htdocs/cashdesk/affContenu.php

htdocs/cashdesk/include/environnement.php

htdocs/cashdesk/validation_verif.php

htdocs/commande/card.php

htdocs/core/modules/modSyncSupplierWebServices.class.php

htdocs/fourn/commande/card.php

htdocs/install/upgrade.php

htdocs/install/upgrade2.php

htdocs/langs/en_US/admin.lang

htdocs/langs/en_US/bills.lang

htdocs/langs/en_US/categories.lang

htdocs/langs/en_US/contracts.lang

htdocs/langs/en_US/cron.lang

htdocs/langs/en_US/orders.lang

htdocs/langs/en_US/resource.lang

htdocs/langs/en_US/users.lang