Delivery slips now separate ordered and delivered quantities, making it easier for customers and warehouse teams to see what was requested versus what was actually shipped. Products that were not delivered are also shown even when no backorder exists, and quantity formatting is now consistent across the document.

[IMP] stock: delivery slip quantities

Some changes in the delivery slip layout:
  - For delivered products, replaces the Quantity column by two other columns: Ordered and Delivered;
  - Shows the non-delivered products even when the delivery is done and haven't any backorder.

Also, fix a little inconsistency in the way float values were displayed in the delivery slip.

task-2373833

Odoo Studio now keeps the message panel below the form while editing, instead of placing it on the side on larger screens. This gives users more horizontal space to customize forms and makes the editing experience easier to use.

PR #8550 
Task 2183697