- Fixes our current incorrect use of
aria-expanded
rather than the properaria-selected
(see https://www.w3.org/TR/wai-aria-practices/#tabpanel) - Removes dynamic tabbed interfaces with dropdowns, as they're not good for usability and more importantly not a pattern that can be expressed/conveyed to assistive tech
Closes #23035 (closed) Further closes #23903 (closed)