[IMP] Added effect while closing tour(help)

Hello,

Task: [IMP] Added effect while closing tour(help)

In Website tour add effect while close the tour at last step.

More details:
https://openerp.my.openerp.com/web#id=8115&view_type=form&model=project.task&menu_id=3942&action=327
https://pad.odoo.com/p/r.KEkp9AA9l53LjOrG

Thanks,
msa