[FIX] point_of_sale: hide 'loading' text when printing
[FIX] point_of_sale: hide 'loading' text when printing

When we are using auto_print without iot box, the 'print()' function on
window is called, and if we are validating a invoiced order, the
download of invoice will let a blockUI over the receipt screen.

To  avoid printing 'Loading' on the receipts, we are not displaying the
blockUI when we print, as it is never expected.

OPW-2199489

closes odoo/odoo#46528

X-original-commit: 54a3ef53e94a756c8635b708b9f187aefc8c5c8b
Signed-off-by: Nicolas Martinelli (nim) <771435c469f83f6aa9c405ac5e1ed06314a94f2d@odoo.com>

ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo,ygol/odoo