[FIX] mail, portal_sale: conserve action in /mail/view

Methods get_formview_action can be called by sudo() so for knowing the
real user they should prefer context['uid'] to uid.

Without the action `/web` can't figure out that e.g the view we want is
the one for portal user and not the default one.

With this fix, portal user (not in base.group_user) get to the intended
view with the intended menu when clicking on a invoice/sale order portal
mail link. As for other user there is no change.

closes #10681
opw-666260

addons/mail/controllers/main.py

@@ -143,6 +143,7 @@ class MailController(http.Controller):
             'id': res_id,
             'active_id': res_id,
             'view_id': record_sudo.get_formview_id(),
+            'action': record_action.get('id'),
         }
         url = '/web?%s#%s' % (url_encode(query), url_encode(url_params))
         return werkzeug.utils.redirect(url)

addons/portal_sale/portal_sale.py

@@ -41,7 +41,8 @@ class sale_order(osv.Model):
         )[document.partner_id.id]
 
     def get_formview_action(self, cr, uid, id, context=None):
-        user = self.pool['res.users'].browse(cr, SUPERUSER_ID, uid, context=context)
+        context = context or {}
+        user = self.pool['res.users'].browse(cr, SUPERUSER_ID, context.get('uid', uid), context=context)
         if user.share:
             document = self.browse(cr, uid, id, context=context)
             action_xmlid = 'action_quotations_portal' if document.state in ('draft', 'sent') else 'action_orders_portal'
@@ -83,7 +84,8 @@ class account_invoice(osv.Model):
         )[document.partner_id.id]
 
     def get_formview_action(self, cr, uid, id, context=None):
-        user = self.pool['res.users'].browse(cr, SUPERUSER_ID, uid, context=context)
+        context = context or {}
+        user = self.pool['res.users'].browse(cr, SUPERUSER_ID, context.get('uid', uid), context=context)
         if user.share:
             return self.pool['ir.actions.act_window'].for_xml_id(cr, uid, 'portal_sale', 'portal_action_invoices', context=context)
         return super(account_invoice, self).get_formview_action(cr, uid, id, context=context)