Migration to version 12.0

[jjscarafia]

Todo

https://github.com/OCA/maintainer-tools/wiki/Migration-to-version-12.0

Modules to migrate

• event_sale_ux
• portal_sale_distributor
• portal_sale_distributor_wesbite_quote
• pos_ux
• sale_delivery_ux
• sale_dummy_confirmation
• sale_exception_credit_limit
• sale_exception_partner_state
• sale_exception_price_security
• sale_exception_print
• sale_exceptions_ignore_approve
• sale_exceptions_timesheet
• sale_margin_ux
• sale_order_line_number
• sale_order_lot_selection_ux
• sale_order_type_automation
• sale_order_type_invoice_policy
• sale_order_type_user_default
• sale_order_type_ux - By @ValentinoDefelice - [REL] sale_order_type_ux migration to 12.0 #234
• sale_order_validity
• sale_quotation_products
• sale_report_last_sale
• sale_require_contract
• sale_require_purchase_order_number
• sale_require_ref
• sale_restrict_partners
• sale_stock_analytic
• sale_stock_availability
• sale_stock_ux
• sale_three_discounts
• sale_three_discounts_ux
• sale_timesheet_ux
• sale_ux - By @nicomacr - [REL] sale_ux migration to 12.0 #233