[MERGE] forward port branch 12.0 up to 82c4393f

addons/account/models/account_invoice.py

addons/account/models/account_move.py

addons/account/tests/test_account_supplier_invoice.py

addons/barcodes/static/src/js/barcode_events.js

addons/barcodes/static/tests/barcode_mobile_tests.js

addons/barcodes/views/barcodes_templates.xml

addons/hw_screen/static/src/js/worker.js

addons/hw_screen/views/pos_display.html

addons/l10n_fr_fec/wizard/account_fr_fec.py

addons/l10n_mx/data/account_tax_data.xml

addons/mail/models/ir_attachment.py

addons/mrp/models/mrp_workorder.py

addons/mrp/tests/test_stock.py

addons/mrp/wizard/mrp_product_produce.py

addons/payment/models/payment_acquirer.py

addons/payment/static/src/js/payment_processing.js

addons/point_of_sale/models/pos_order.py

.../point_of_sale/static/src/css/customer_facing_display.css

addons/point_of_sale/static/src/css/pos.css

...oint_of_sale/static/src/scss/customer_facing_display.scss