The "Show Desktop" plugin works under Wayland compositors that are compatible with wlroots.
In addition:
- Workarounds are added for kwin_wayland's problems with showing desktop.
- The children of a window are minimized with it on kwin_wayland.
- Redundant attention demands (urgency hints) are removed under kwin_wayland.
- A rare DND crash is prevented in Task Manager under Wayland.
- Removed ancient QT_USE_XXXX variables and dropped QTX_LIBRARIES.
- Timezone switching with mouse wheel is made optional in World Clock.
- Added an icon for plugin-sensors.
- Code cleanup.