10.4.3

• Addon Docs: Fix Primary and Controls blocks not rendering in custom MDX pages - #34496, thanks @NYCU-Chung!
• Core: Respect !dev tag on MDX docs in sidebar - #35031, thanks @JReinhold!
• React: Add support for resolving subcomponents attached as properties of a parent component - #34967, thanks @yatishgoel!
• UI: Prevent docs page scroll reset on HMR re-render - #35021, thanks @LongTangGithub!