[FIX] web_kanban: fix the issue of undefined group_id and not set title of undefined ...

...stage

- Task: https://www.odoo.com/web?#id=11050&view_type=form&model=project.task&menu_id=3942&action=327
- Pad: https://pad.odoo.com/p/openerp-project.task-T443HEQSRW