New: Add option MAIN_ADD_SALE_REP_SIGNATURE_IN_NOTE

Conflicts:
	ChangeLog

Conflicts:
	ChangeLog
	htdocs/core/modules/commande/doc/pdf_proforma.modules.php
	htdocs/core/modules/facture/doc/pdf_crabe.modules.php
	htdocs/core/modules/propale/doc/pdf_azur.modules.php