[FIX] : subscribe/unsubscribe button not work
[IMP]: layout
[IMP] website_mail: refactor follow button; add partner_id in session for public user
Launchpad automatic translations update.
[FIX] [IMP] website_mail: improved and fixed the 'subscribe button'.
This button is used to perform a 'message_subscribe' or 'message_unsubscribe' on some
documents. It is notably used to add a 'Subscribe' button in some pages that subscribe
the user to a mailing list (aka mail.group).
This branch fixes some subscribe/unsubscribe issues, better manages the public user,
use the session to remember whether a public user has subscribe to a mailing list,
and uses already-existing code to manage partners.
[MERGE] [FIX] Merged branch holding some fixes for the newly
(badly ?) introduced module website_mail_group: subscribe / unsubscribe now working,
pager now working. Some redesign will probably land in trunk if we have time
as the current layout is not very efficient.