[FIX] web: ignore numpad for hotkeys

To reproduce the issue:
(Need a Windows machine)
1. Install Stock
2. Inventory > Products > Products
3. Try to write the diameter symbol (ALT + 155) in the search bar

Error: When pressing the key '1' on the keyboard, the page is redirected
to the Inventory Overview page

Because of hotkeys, it is not possible to use the Windows feature that
allows users to write ASCII characters with ALT+[numerical code from
keypad].

OPW-2731632

closes odoo/odoo#86981

X-original-commit: a0f419c4
Signed-off-by: Bruno Boi <boi@odoo.com>
Signed-off-by: Adrien Widart <awt@odoo.com>
Co-authored-by: Bruno Boi <boi@odoo.com>