[MERGE] forward port branch 12.0 up to c9913152

addons/auth_signup/controllers/main.py

addons/base_import_module/models/ir_module.py

addons/base_setup/data/base_setup_data.xml

addons/event_sale/models/sale_order.py

addons/hr_expense/models/hr_expense.py

addons/hr_holidays/models/hr_leave.py

addons/hr_holidays/models/hr_leave_allocation.py

addons/hr_holidays/tests/test_leave_requests.py

addons/l10n_fr_pos_cert/models/__init__.py

addons/l10n_fr_pos_cert/models/account_fiscal_position.py

addons/mail/models/mail_template.py

addons/mrp/models/mrp_workorder.py

addons/mrp/models/res_config_settings.py

addons/mrp/models/stock_warehouse.py

addons/point_of_sale/data/point_of_sale_data.xml

addons/point_of_sale/models/pos_order.py

addons/point_of_sale/views/account_journal_view.xml

addons/purchase/report/purchase_bill.py

addons/purchase/views/purchase_views.xml

addons/purchase_stock/models/account_invoice.py