T1000-develop: Put a link to the position of mail

Put the "ancre" in the mail.
When you click on "send mail", it is located directly on the mail to send

/htdocs/compta/facture.php?facid=1077&action=presend&mode=init;#mail
htdocs/commande/fiche.php?id=468&action=presend&mode=init;#mail
htdocs/comm/propal.php?id=867&action=presend&mode=init;#mail