[FIX] access rights for public user on res.partner.grade
[FIX] duplicate xmlid
Merge pull request #210 from odoo-dev/saas-4-fix-partner-grade-access-fme

[FIX] access rights for public user on res.partner.grade
[FIX] website_sale: test did not load js properly and failed
[FIX] web: on launching ir_actions_act_window, reset the active_* params if the target is current

This commit is related to 8d496399336b4a97200f6f7b5907ed1c7b99970c and b88755c4317ac61fc8d0533162d4ed19082f3fab
When hitting buttons of type object, the active_model and active_id(s) were kept, and, therefore, when calling a feature using the active* args, this feature used the active* args from the previous action.
Nevertheless, concerning wizards, the active* args should be indeed the active* args of the previous action, as wizards expects to have the active* args from the previous action. Thus, we reset these active* args only when this is not a wizard (target === 'current')
For example, from a sales order, hit the 'view invoice' button, and on the invoice, hit the 'send by email' button: The active_id in the send by email wizard were the id of the sale order, not of the invoice
[IMP] website_mail: improved snippet to subscribe to a mail.group.

Main modifications :
- layout: input - button when not following, links (email - archives - unsubscribe) when following
- when adding your email, update all other subscribe snippets input in the page to avoid havign to re-type it
- management of fields of the record to subscribe to, used to have access to the alias of the group