Revert "slapos_jio: after activate the login come back to WebSite and not to the portal."

This reverts commit dee343f3.

This fixes ERP5Site_activeLogin on slapos master because right now we
have this URL in emails sent to customer to activate their login:

https://slapos.vifib.com/hateoas/connection/ERP5Site_activeLogin?key=XXX

So the script is setupping the came from as:

https://slapos.vifib.com/hateoas/connection/#!login?p.page=slapos{&n.me}

which is not working (returns AttributeError: form_view error)

The URL https://slapos.vifib.com/#!login?p.page=slapos{&n.me} is working
though.

Note that it may break development instance if you don't have a special
frontend for your website.

master/bt5/slapos_jio/SkinTemplateItem/portal_skins/slapos_hal_json_style/ERP5Site_activeLogin.py

@@ -6,7 +6,7 @@ portal = context.getPortalObject()
 assert key
 mail_message = portal.ERP5Site_unrestrictedSearchMessage(key=key)
 
-came_from = context.getWebSectionValue().absolute_url() + "/#!login?p.page=slapos{&n.me}"
+came_from = portal.absolute_url() + "/#!login?p.page=slapos{&n.me}"
 credential_request = mail_message.getFollowUpValue()
 if credential_request.getValidationState() in ('submitted', 'accepted'):
   message = translateString("Your account is already active.")