This was suppsed to be ".list-row.button", I'd imagine, but the missing dot meant it never worked in the first place. Just clean it up.
9cbd9c4 Adwaita: Remove non-working selector
gtk/theme/Adwaita/_common.scss | 2 +-
gtk/theme/Adwaita/gtk-contained-dark.css | 479 ++++++++++++------------------
gtk/theme/Adwaita/gtk-contained.css | 479 ++++++++++++------------------
3 files changed, 393 insertions(+), 567 deletions(-)
Upstream: git.gnome.org