[IMP] improve visibility changes as per task specification

- Task: https://www.odoo.com/web#id=5183&view_type=form&model=project.task&action=333&active_id=131
- Pad: https://pad.odoo.com/p/r.osgTl7m2AJDF4CQy
In stock.picking not any def onchange_partner_id() is there. thats why super is no more.