Upstream our window list theme changes
Any non-upstreamed change we apply is essentially a bug (due to its maintenance cost), so this ticket is about tracking the upstreaming process of the changes applied for #12233 (closed).
- Upstream bug report: https://gitlab.gnome.org/GNOME/gnome-shell-extensions/issues/22
- Upstream merge request: https://gitlab.gnome.org/GNOME/gnome-shell-extensions/merge_requests/3
- Related to #12233 (closed)