[IMP] kanban view:- fix problem of multiple time reload view on button click.
[IMP] kanban view:- fix problem of multiple time reload view on button click.

havt/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web,akretion/openerp-web,havt/openerp-web,havt/openerp-web,akretion/openerp-web