The sale services area was reorganized and updated to use Odoo's newer development framework. This should make the feature easier to maintain and more reliable over time, without introducing major visible changes for users.

Task: https://www.odoo.com/web#id=13741&view_type=form&model=project.task&menu_id=3942&action=327

Pad: https://pad.odoo.com/p/r.VbuOmLp8P5Am3iyH