TL;DR

Final fixes for Catalog Promotions' system

Details

• #13431 FIX: Avoid passing empty needle to strpos() (@rimas-kudelis)
• #13588 Use semantic ui view instead of deprecated semantic_ui_translated (@loic425)
• #13604 [CatalogPromotion][UI][Shop] Fixed label displaying after option change (@Rafikooo)
• #13606 [Catalog Promotion] Add exclusive flag to UI (@AdamKasp)
• #13607 [Catalog Promotion][UI] Fixed error when trying to save catalog promotion with empty percentage discount value (@ernestWarwas)
• #13608 [Catalog Promotion] Improve fixtures (@AdamKasp)
• #13611 Optimize variant autocomplete selector (@rafal.@swierczek@@drophub.@pl)
• #13614 [Maintenance] Add info about messenger transport and api_platform directory to UPGRADE files (@GSadee)
• #13616 [Behat][API] Fixed adding simple product scenarios (@ernestWarwas)
• #13620 Changes in Catalog Promotions validation (@Zales0123)
• #13623 [Core] Reorganize namespaces of services related with catalog promotions (@GSadee)
• #13624 [CatalogPromotions] Refactor processing catalog promotions states to use commands (@GSadee)
• #13626 [Behat][Api] Second part of fixing simple product creation in api tests (@ernestWarwas)
• #13627 Move ScopeValidatorInterface to PromotionBundle (@Zales0123)
• #13629 [Catalog Promotion] Fix priorities fixtures (@AdamKasp)
• #13630 [Docs][Catalog Promotion] Warning added to docs (@AdamKasp)
• #13633 [UPGRADE] Add more details about PHP, mocker container and api platform folder (@lchrusciel)
• #13635 [Docs] Drop warning about active, not applied promotions as states are handled in async manner as well (@lchrusciel)
• #13637 [CatalogPromotion] Move scope validator and constraint to PromotionBundle (@GSadee