[IMP] pos_restaurant: improve preparation display functionality

Behavior before the changes:
- When a note was modified, it cancelled the old orderline and recreated
it with the new note.
- Products were not sorted by category in the order preparation display.
- Clicking on the header of an order sent it directly to the next stage,
regardless of whether lines were crossed out or not.
- There were brackets around the order number.

Behavior after changes:
- When a note is modified, it is modified directly on the existing
orderline.
- Products are now sorted by category in the order.
- Clicking on an order header sends only the crossed-out lines to the
next stage. If no line is crossed out, the entire order is sent.
- There are no longer any brackets around the order name.

taskId: 3764317
enterprise PR: https://github.com/odoo/enterprise/pull/57385

closes odoo/odoo#155246

Related: odoo/enterprise#57385
Signed-off-by: Adrien Guilliams (adgu) <adgu@odoo.com>

addons/pos_restaurant/static/src/app/control_buttons/orderline_note_button/orderline_note_button.js

@@ -22,6 +22,7 @@ export class OrderlineNoteButton extends Component {
             return;
         }
 
+        const oldNote = this.selectedOrderline.getNote();
         const { confirmed, payload: inputNote } = await this.popup.add(TextAreaPopup, {
             startingValue: this.selectedOrderline.getNote(),
             title: _t("Add internal Note"),
@@ -30,6 +31,8 @@ export class OrderlineNoteButton extends Component {
         if (confirmed) {
             this.selectedOrderline.setNote(inputNote);
         }
+
+        return { confirmed, inputNote, oldNote };
     }
 }