The reason for a disabled menu row lived in a `title` on a natively disabled
button: no pointer events, so no tooltip, and roving focus skips the row —
four translated sentences reached nobody (the Watch later rename/delete
lock, "no other list to move to", the reorder gate). An aria-disabled row was
tried and reverted in E10's review. ActionMenu items now take a `note`,
rendered as a muted line under a disabled row's label: seen, and readable in
a screen reader's browse mode. Only the icon and label dim — row-level
opacity would dim the explanation too. The reorder group states its reason
once, under its first row.
peter
bc138e3b37