This commit removes the strange selection box based on a magic flag and
some strange methods returning a string. Instead just allow to send mass
mailing on all models inheriting from mail.thread using the is mail
thread flag.
Various addons are updated to remove the _mail_mass_mailing class
attribute used to determine mass mailing capability.
We consider people could send a mass mailing on every model inheriting
from mail.thread. It makes no sense to limit it to a given set of addons.
The goal is to prepare the removal of
'portal' module.
- demo portal user is moved into base
- 'is_portal' field on res.group too
- remaining security rule are moved to base too
- mail template is moved to website_portal
Yannick Tivisse