Point of Sale now correctly includes tax for the full quantity when customers buy more than one of the same product. This prevents underpaid orders from being created in the backend and helps keep payment totals accurate.

Before this, creating an order with two of the same products would
result in a total price to pay which would only include the tax of one
product. This would cause point of sale orders in the backend which
weren't fully paid.

The import language wizard now validates uploaded translation files and shows clearer warnings when an import fails. The file upload field was also fixed so users can reselect the same file after clearing it, reducing confusion during translation imports.

Fixed generic problem in separated commits

<b>Task:</b> https://www.odoo.com/web#id=12446&view_type=form&model=project.task&menu_id=3942&action=327
<b>Pad:</b> https://pad.odoo.com/p/r.D3HP8x4xYvT6HG1d