
Resource icons are added to the fallback icon theme, so they won't get used if a matching icon is found in the configured theme. That includes fallback names, so Adwaita's "window-close-symbolic" takes precedence over "window-close-24-symbolic" in hicolor. Fix this by using a custom name for a custom icon. Part-of: <https://gitlab.gnome.org/GNOME/gnome-shell/-/merge_requests/1640>