ngraham added a comment.
If we're going to consider the titlebar a part of the tools area, then it needs a separator line underneath it whether it's drawn on a Blender window or a Plasma config window The idea was always to draw a separator line under the bottom-most element of the Tools Area in all apps, whether that bottom-most element was a menubar, toolbar, or the SSD titlebar drawn by KWin. REPOSITORY R31 Breeze REVISION DETAIL https://phabricator.kde.org/D27669 To: cblack, #plasma, #breeze, #vdg, hpereiradacosta, davidre Cc: maartens, abstractdevelop, IlyaBizyaev, davidre, davidedmundson, hpereiradacosta, 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