For making it possible to have Qt5 and Qt6 installations of
libqtxdg alongside each other in near future, two changes are
made to this point release:
* qtxdg-mat has been separated from libqtxdg and put into qtxdg-tools.
* The installation of config files has been made optional.
OBS-URL: https://build.opensuse.org/package/show/X11:LXQt/libqt5xdg?expand=0&rev=30
