bug#46990: 28.0.50; popup menu not navigable via arrow keys on lucid build

[Eli Zaretskii]

> From: Colin Baxter <m43cap@yandex.com>
> Cc: contovob@tcd.ie,  46990@debbugs.gnu.org
> Date: Wed, 10 Mar 2021 20:30:55 +0000
> 
> I can now confirm that if I install the git master branch and launch
> emacs from the installed bin directory, I can navigate the lucid
> menu-bar via the arrow keys and the mouse. However if I launch emacs from
> the git/src directory then I can not navigate the menu-bar via the
> arrow keys. I can only navigate via the mouse.
> 
> It also explains why I thought the effect only occurred in the second
> pre-test and not the first. I remember that I installed the first but
> not the second.

Thanks, things are more clear now.

> I'm not confident I can bisect, having never done it. It depends on the
> available times, though, but certainly I will try.

Thank you.