ngraham added a comment.
In fact, we've got an open request to //add// this line to the Breeze theme for Qt apps... https://bugs.kde.org/show_bug.cgi?id=386306 REPOSITORY R98 Breeze for Gtk REVISION DETAIL https://phabricator.kde.org/D12055 To: zzag, #breeze Cc: ngraham, plasma-devel, ragreen, Pitel, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart