[IMP] project: onboarding tips

- Task: https://www.odoo.com/web#id=8868&view_type=form&model=project.task
- Pad: https://pad.odoo.com/p/r.Z2Skh5v9TNq61mZm
Not a proper solution, not work with when large records to render or more than one, one2many shown in form.