ngraham added a comment.
Also, the subcategory header is //already// bold when not in widescreen mode, so the fact that it's still light in widescreen mode is likely a simple bug. REPOSITORY R124 System Settings REVISION DETAIL https://phabricator.kde.org/D11757 To: ngraham, mart, #plasma, #vdg Cc: richardbowen, plasma-devel, ragreen, ZrenBot, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, mart