* Optionally auto-hide panel only when it overlaps a window.
* Workaround for an issue with glibc 2.33 on old Docker engines.
* Fixed the popup of grouped task button in a special case.
* Fixed changing of world clock's time zone with mouse wheel.
* Code cleanup and modernization.
OBS-URL: https://build.opensuse.org/package/show/X11:LXQt/lxqt-panel?expand=0&rev=37
