… menus. They were previously semi-keyboard accessible, but the visual feedback was poor, and tabindexes were set in the wrong places. This seems to do the trick, but requesting a a11y overview from @wilto if he has time :) Fixes #3658
… and in particular, focusin and focusout. This indirectly fixes #3658, making keyboard access clearer when themes have subtle state shifts. @toddparker, please confirm the fix and if I missed something beyond this, can you reopen?