4.12.0

Enhancements

• Added a split variant to Button (#2329)
• Allow DataTable headers to be React Elements (#2635)
• Added support for explicit order of items in ActionMenu (2057)
• Made the DataTable horizontal Navigation optional (#2647)

Bug fixes

• Fixed ReferenceError: React is not defined in Button for the esnext build (#2657)
• Fixed scrolling with scrollbar not working in Popover when content changes on scroll (#2627)
• Fixed side-effects from being create during Modals render (#2644)
• Work around a build crash when using create-react-app due to a bug in css parsing in postcss-custom-properties (#2643)
• Removed the visited CSS styling for tabs using the url prop (#2639)

Development workflow

• Reworked the yarn splash Github comment and added average splash zone information (#2649)
• Re-enabled the web unit tests in the consumer build test (#2663)

Code quality

• Converted /tests/build.test.js to TypeScript (#2617)
• Use export * to rexport component content in component indexs and subcomponent listings (#2625)
• Use export * to rexport utility content (#2636)