• Add Marketplace download source menu item for the China mirrors (@frenck - #55615)
• Fix the demo embed for the contributors site (@timmo001 - #55596)
• Add descriptive aria-labels to picker filter chips (@wendevlin - #55592)
• Stop recomputing active system domains on every state change in the add element dialog (@maartenla - #55586)
• Let core work out what target exclusions take out (@jpbede - #55585)
• Add an option to include pre-releases in Marketplace repositories (@piitaya - #55567)
• Wrap long descriptions in the entity settings (@wendevlin - #55590)
• Fix README images and links with a relative path in the Marketplace (@alexhass - #55525)