treat accessKey as a keyboard event not as a mouse click, fixes #17254
(cherry picked from commit 904170f56f9b81f33f54828a6fcd059aa08ba01d)
add aria-labelledby to menus spawned by PopupMenu[Bar]Item, fixes #17255
(cherry picked from commit 6bca00a2941efd9bf6fc52ff872233067390a286)