Up and down arrows do not work in search.

[zzmp]

They are currently documented, but #15037 will change that to tabs, which do work.

Unless they are to be fixed, there is dead code in the static main.js to make them work. Search on e.which (assuming #15037 goes through, otherwise, search on e.keyCode) to find the dead code.

[huonw]

This looks like a dupe: #15011