Widgets in GTK apps (using Awaita) are intended to be displayed differently depending on window state. But on KDE they all look the same, regardless of window state. This bug should be resolved for apps to look as intended and for reasons of consistency between QT themes (which can make use state) and GTK themes. Also, it's a nice effect. Operating System: Kubuntu 18.10 KDE Plasma Version: 5.14.3 Qt Version: 5.11.1 KDE Frameworks Version: 5.52.0 Kernel Version: 4.18.0-11-generic OS Type: 64-bit
KWin X11 is feature frozen. I'm sorry we won't implement this feature request.