Some applications don't have AppIcon

[Joel Carnat]

Hi,

There are some applications that don't have icons on my laptop. They do
appear in the task / windows list but I can't dock them or even see them
in the icon zone.

This is the case for Ungoogled Chromium and Alacritty. But many others
wether they are "pure X11" (like xterm), "pure GTK" (like mousepad),
"pure QT" (like KeePassXC) or Firefox or Thunderbird do work properly.

I have tried tuning various things in the ~/GNUstep/Defaults files but
couldn't manage to get the icons. Is there some known tricks to solve this?

In case it matters, I'm using 0.96.0 on OpenBSD.

Thanks,
Joel C.