[FIX] stock: inventory adjustments no update on keydown after 0 input

Community PR: https://github.com/odoo/odoo/pull/112978

Since the transition of the inventory adjustments view to owl in https://github.com/odoo/odoo/commit/350a7a0d6f4816ee75676b80a9a5b9769bf80fe6, a bug was introduced in the inventory adjustments view.

To reproduce:
- Go to inventory adjustments page
- Enter a 0 quantity in any of the Counted Quantity lines.
- Press enter/tab/shift-tab to confirm.

When focussing out of the field using the mouse after editing the field value, the difference field gets updated automatically, however when using a keypress as above, the field just stays the same.

Solved by adding overridden `onKeydown` behaviour in the `counted_quantity_widget` similar to the existing `onInput` behaviour.

closes odoo/odoo#113040

X-original-commit: 3cf3d2ba17265cc8f17facaf8a6bece0b6eddcbe
Signed-off-by: Arnold Moyaux (arm) <arm@odoo.com>

addons/stock/static/src/widgets/counted_quantity_widget.js

@@ -2,6 +2,7 @@
 
 import { FloatField, floatField } from "@web/views/fields/float/float_field";
 import { registry } from "@web/core/registry";
+import { getActiveHotkey } from "@web/core/hotkeys/hotkey_service";
 
 const { useEffect, useRef } = owl;
 
@@ -16,8 +17,10 @@ export class CountedQuantityWidgetField extends FloatField {
             (inputEl) => {
                 if (inputEl) {
                     inputEl.addEventListener("input", this.onInput.bind(this));
+                    inputEl.addEventListener("keydown", this.onKeydown.bind(this));
                     return () => {
                         inputEl.removeEventListener("input", this.onInput.bind(this));
+                        inputEl.removeEventListener("keydown", this.onKeydown.bind(this));
                     };
                 }
             },
@@ -30,6 +33,12 @@ export class CountedQuantityWidgetField extends FloatField {
         return this.props.record.update({ inventory_quantity_set: true });
     }
 
+    onKeydown(ev) {
+        const hotkey = getActiveHotkey(ev);
+        if (["enter", "tab", "shift+tab"].includes(hotkey))
+            this.onInput(ev)
+    }
+
     get formattedValue() {
         if (
             this.props.readonly &&