[FIX] mail_tip : On an empty DB, when you install contacts and purchase ...

...module, the webclient crashes
Task : https://www.odoo.com/web#id=11033&view_type=form&model=project.task&menu_id=3942&action=327
Pad : https://pad.odoo.com/p/r.N6Nq6gEcxsJVwqZS