POS Edit Order Line

This module makes it easier for cashiers to correct an order in the Point of Sale. A new button, "Edit Order Lines", appears on the POS product screen next to the other control buttons. Pressing it opens a popup listing every line of the current order with columns for Product, Quantity, Unit of Measure, Price excl. VAT and, when manual discounts are enabled on the POS, Discount.

• Each value can be typed directly into the popup instead of using the usual select-then-edit flow.
• The Confirm button applies all the typed changes to the order lines at once; Cancel closes the popup without changing anything.
• If a field is left with an invalid (non-numeric) value, the popup refuses to confirm and highlights the field.
• If the order has no products yet, an alert tells the user to add products first.

A new setting, "Allow edit Order Line in popup", is added to the Point of Sale settings under the interface section. It is enabled by default and is stored on each point of sale configuration (pos.config), so it can be turned off per POS. The module only touches the Point of Sale configuration and settings screens; it does not create new menus or reports.