[MERGE] forward port branch saas-11.3 up to 53300648

addons/account_payment/i18n/es.po

addons/auth_signup/models/res_users.py

addons/base_import/i18n/es.po

addons/bus/static/src/js/bus.js

addons/crm/i18n/es.po

addons/delivery/i18n/es.po

addons/delivery/models/delivery_carrier.py

addons/delivery/models/sale_order.py

addons/hr_holidays/models/hr.py

addons/hr_payroll/views/hr_salary_rule_views.xml

addons/im_support/__init__.py

addons/im_support/__manifest__.py

addons/im_support/models/__init__.py

addons/im_support/models/ir_http.py

addons/im_support/static/src/js/chat_manager.js

addons/im_support/static/src/js/discuss.js

addons/im_support/static/src/js/extended_chat_window.js

addons/im_support/static/src/js/support_bus.js

addons/im_support/static/src/js/support_session.js

addons/im_support/static/src/js/systray.js