Improvements to Delivery behaviour and handling times

In this release, we are introducing a large amount of long-awaited updates to Delivery settings! The delivery handling times have received a UI update, which should make them easier to understand and set up. Handling times can now also be defined to only count weekdays (mon-fri), or days when your store is open! Delivery options have also received the possibility to control how they behave together with your opening hours - you can choose per delivery option whether delivery, pickup and self-return are available on days when your store is closed. This update also fixes various minor bugs and inconsistent behaviour related to delivery timeslots and availabilty.