[MERGE] forward port branch saas-11 up to 34186fdf

addons/account/models/account_invoice.py

addons/account/views/report_agedpartnerbalance.xml

addons/account_asset/account_asset_invoice.py

addons/calendar/calendar.py

addons/event/models/event_mail.py

addons/hr_expense/models/hr_expense.py

addons/hr_holidays/models/hr_holidays.py

addons/l10n_de_skr03/account_chart.xml

addons/l10n_de_skr04/account_chart.xml

addons/l10n_fr/fr_fiscal_templates.xml

addons/l10n_fr/fr_tax.xml

addons/mail/models/mail_template.py

addons/mail/models/mail_thread.py

addons/mail/wizard/mail_compose_message.py

...purchase_requisition/views/purchase_requisition_views.xml

addons/stock/models/product.py

addons/stock/views/stock_pack_operation_views.xml

addons/web/static/src/js/views/form_relational_widgets.js

addons/web/static/src/less/webclient_layout.less

addons/website/static/src/js/website.js