[IMP] Mass mailings send in cron

1. The merge of the "email_template" module into the "mail" module.
2. The send action of the mass mailing has been moved from the frontend to a cron, because it was too slow to send over 10,000 mails (the user's browser was blocked for 15 - 20 minutes). Mass mailings have now their own process in the kanban view.
3. Mails sent from the mail form are sent immediatly instead of from the mail queue (for instance, when you go to sales > customers > list view > select 2 -3 customers > More > Partner Mass Mailing).
4. Users have now the choice from which mailing list they want to unsubscribe when they click on the unsubscribe link at the bottom of the mail.
5. Mass mailings inherit from their campaign UTMs and mass mailing campaigns are linked to an UTM campaign.
6. Many little improvements

1 files changed, 3 insertions, 0 deletions

diff --git a/addons/mail/__init__.py b/addons/mail/__init__.py
index 138ed62a8ee..8ba5c95fd4e 100644
--- a/addons/mail/__init__.py
+++ b/addons/mail/__init__.py
@@ -27,6 +27,7 @@ import mail_message
 import mail_mail
 import mail_thread
 import mail_group
+import mail_template
 import res_partner
 import res_users
 import report
@@ -35,3 +36,5 @@ import res_config
 import mail_group_menu
 import update
 import controllers
+import ir_actions
+import html2text
\ No newline at end of file