[MERGE] forward port branch 10.0 up to 788750ea

addons/event/models/event.py

addons/l10n_nl/data/account_tax_template.xml

addons/link_tracker/models/link_tracker.py

addons/payment_ogone/controllers/main.py

addons/sale/models/sale.py

addons/stock/models/stock_scrap.py

addons/stock/tests/__init__.py

addons/stock/tests/test_stock_scrap.py

addons/web/static/lib/qweb/qweb-test-widgets.xml

doc/cla/corporate/eficent.md

doc/cla/individual/subodhdahal.md

doc/howtos/themes.rst

odoo/addons/base/ir/ir_model.py

odoo/addons/base/ir/ir_qweb/fields.py

odoo/addons/test_new_api/tests/test_new_fields.py

odoo/http.py

odoo/service/security.py

odoo/tests/common.py