Qt 6.8.0 has a regression that randomly creates artifacts in translucent windows under Wayland. A workaround has been added for it, such that the windows/menus/tooltips which are made translucent by Kvantum are not affected by it.
Also,
● Dragged tabs of Qt ≥ 6.6 are drawn as single tabs (like they were drawn with Qt < 6.6).
● Bumped the minimum required version of Qt6 to 6.6.
● Said goodbye to KF5. Since the current version, the Qt5 plugin is compiled without it (which means no blurring for Qt5 apps under Wayland).
● Updated and cleaned up the code.