[MERGE] forward port of branch 8.0 up to 327e471c

addons/account/account_move_line.py

addons/base_import/models.py

addons/calendar/calendar.py

addons/google_calendar/google_calendar.py

addons/mail/wizard/mail_compose_message.py

addons/mrp/mrp.py

addons/mrp/procurement.py

addons/mrp/stock.py

addons/mrp_operations/mrp_operations.py

addons/payment_adyen/models/adyen.py

addons/point_of_sale/point_of_sale.py

addons/point_of_sale/static/src/js/models.js

addons/point_of_sale/static/src/js/screens.js

addons/point_of_sale/static/src/js/widget_base.js

addons/point_of_sale/static/src/xml/pos.xml

addons/pos_restaurant/static/src/js/splitbill.js

addons/purchase/purchase.py

addons/report/models/report.py

addons/report/views/layouts.xml

addons/sale_stock/sale_stock.py