Fix: uniformize code

htdocs/admin/modules.php

htdocs/comm/mailing/fiche.php

htdocs/commissions/admin/commissions.php

htdocs/commissions/index.php

htdocs/commissions/lib/commissions.lib.php

htdocs/core/class/html.form.class.php

htdocs/core/modules/modCommissions.class.php

htdocs/core/modules/modMargin.class.php

htdocs/expedition/fiche.php

htdocs/filefunc.inc.php

htdocs/install/lib/repair.lib.php

htdocs/langs/fr_FR/commissions.lang

htdocs/margin/admin/margin.php

htdocs/margin/agentMargins.php

htdocs/margin/customerMargins.php

htdocs/margin/lib/margins.lib.php

htdocs/margin/productMargins.php

htdocs/margin/tabs/productMargins.php

htdocs/margin/tabs/thirdpartyMargins.php

htdocs/product/ajaxproducts.php