[IMP] Added default_group_by attribute for kanban view
[IMP] Added default_group_by attribute for kanban view

splbio/openobject-server,MarkusTeufelberger/openobject-server,ovnicraft/openerp-server,splbio/openobject-server,gisce/openobject-server,vnc-biz/openerp-server,ovnicraft/openerp-server,vnc-biz/openerp-server,gisce/openobject-server,gisce/openobject-server,MarkusTeufelberger/openobject-server,splbio/openobject-server,MarkusTeufelberger/openobject-server