Merge remote-tracking branch 'origin/3.6' into develop

Conflicts:
	ChangeLog
	htdocs/categories/fiche.php
	htdocs/comm/action/index.php
	htdocs/comm/propal.php
	htdocs/commande/fiche.php
	htdocs/compta/facture.php
	htdocs/compta/facture/class/facture.class.php
	htdocs/contrat/class/contrat.class.php
	htdocs/core/class/commonobject.class.php
	htdocs/core/tpl/objectline_create.tpl.php
	htdocs/fourn/fiche.php
	htdocs/product/composition/fiche.php
	htdocs/product/price.php
	htdocs/projet/tasks/task.php
	htdocs/projet/tasks/time.php