[MERGE] forward port branch saas-15 up to 7a45296c

addons/account/models/account_move.py

addons/account/tests/test_reconciliation.py

addons/l10n_ch/i18n_extra/de_CH.po

addons/mass_mailing/models/mass_mailing.py

addons/portal/views/portal_templates.xml

addons/product/models/product_pricelist.py

addons/purchase/models/purchase.py

addons/survey/security/survey_security.xml

addons/web/controllers/main.py

addons/website/views/website_templates.xml

addons/website_sale/views/templates.xml

addons/website_sale_delivery/models/sale_order.py

doc/cla/individual/bigbear3001.md

doc/cla/individual/highcooley.md

doc/setup/install.rst