Workaround for https://bugzilla.redhat.com/1316387 (systemctl preset-all disables but wont enable default.target). QubesOS/qubes-issues#2412
Some preset files may be installed when actual services are already enabled/disabled. To not worry about package installation order, simply reset all the services to default state when all the packages are installed. Fixes QubesOS/qubes-issues#2049