[IMP]crm,Sales_team: misc improvement

Task : https://www.odoo.com/web#id=10513&view_type=form&model=project.task&menu_id=3942&action=327
pad : https://pad.odoo.com/p/r.lYGlvKTFw4Lxd4oJ
Nope nope nope. The sentence "Lead Created" is a technical limitation, adding subtypes will confuse the user too much.