[IMP] website: Kanban is sortable for one column if the field sequence is available inside the kanban view (or one2many kanban view).
Merge pull request #360 from odoo-dev/master-sortable-kanban-sequence-chm

[IMP] website: Kanban is sortable for one column if the field sequence is available inside the kanban view (or one2many kanban view).
 Merge branch 'master' of https://github.com/odoo/odoo into master-win32