[MERGE] forward port branch saas-12 up to 84429ab9

addons/auth_ldap/models/res_company_ldap.py

addons/l10n_be/i18n_extra/nl_BE.po

addons/mail/static/src/js/chat_manager.js

addons/maintenance/data/maintenance_data.xml

addons/maintenance/data/maintenance_demo.xml

addons/mass_mailing/controllers/main.py

addons/sale/models/sale.py

addons/sale/wizard/mail_compose_message.py

addons/stock_account/models/account_invoice.py

addons/stock_account/views/product_views.xml

addons/website_quote/controllers/main.py

addons/website_sale/controllers/main.py