niccolove added a comment.
It should not be the window decoration theme to draw the line, as the user might want to change the decoration whilst preserving the tools area appearance. I'm not sure how Kvantum does it, but it's able to draw 1px lines on apps: F8132802: Screenshot_20200226_095018.png <https://phabricator.kde.org/F8132802> Except for kirigami, which have their own: F8132807: Screenshot_20200226_095239.png <https://phabricator.kde.org/F8132807> REPOSITORY R31 Breeze REVISION DETAIL https://phabricator.kde.org/D27669 To: cblack, #plasma, #breeze Cc: ngraham, manueljlin, niccolove, ndavis, plasma-devel, Orage, LeGast00n, The-Feren-OS-Dev, cblack, jraleigh, zachus, fbampaloukas, GB_2, ragreen, ZrenBot, himcesjf, lesliezhai, ali-mohamed, jensreuterberg, abetts, sebas, apol, ahiemstra, mart
