LP: #1977769 breaks the app theme

[0s1ride]

In LP: #1977769 the background color was changed to purple. This was done regardless of the user preference (light/dark theme) that is set through the application's hamburger menu or system wide. This was the commit: https://git.launchpad.net/ubuntu/+source/gnome-console/commit/?id=8e7fce1cb32c3fdbcfcb5bf486d8bafca91b9e43

It took me a while to understand what was going on: the light/dark theme switcher in libadwaita is usually consistent across apps. I thought I somehow messed with my system, because even the Debian package, which I expected not having the Ubuntu colors, has the same issue. Eventually I found out this is hardcoded here and on Debian too (https://sources.debian.org/src/gnome-console/45.0-1/src/kgx-terminal.c/#L168).

What I expected to happen: switching to dark theme should set the background black, and -more importantly- switching to light theme should set the background white.
What happened instead: light/dark theme preference is ignored, background is always purple.

Ubuntu version: 23.10
gnome-console version: 45.0-1

[Launchpad Janitor (janitor)]

Status changed to 'Confirmed' because the bug affects multiple users.