Sales order lines now keep a product's explicit tax setup instead of automatically applying the company default sales tax. This prevents incorrect taxes from being added to products that should be sold tax-free, improving invoice accuracy.

Steps to reproduce the bug:

- Let's consider a product P without sales taxe
- Set in Accounting > Settings a default sale tax T
- Create a SO and add a new line L with P

Bug:

The tax set on L was T instead of no tax.

opw:2221104

HR-related forms now save key field updates more consistently instead of relying on temporary screen-only reactions. This should reduce surprises when employee, payroll, referral, and salary simulation data is edited or reused across workflows.