Set autologin parameters for lightdm in
/etc/lightdm/lightdm.conf.d/autoinstall.conf

It could result in a broken config given broken chroot state;
it's of no practical difference as both cases just won't work
but we can at least provide meaningful diagnostics (and a bit
of perfectionism, heh).

Fixes: 2527fe94da2e810cf5d52cf548f84456fd5a6b4d

These belong to power feature, if still.

It's only included in kde5 flavour anyways :-)

This feature ensures the availability and specification of the choice of
office package by analogy with the choice of browser. Additional options
may be set by explicit or indirect request.

Also added qasmixer in mixin/regular-xfce-sysv

...it's no more in Sisyphus

udev-alsa is not needed. Volume problems are no more.

...from Xfce-based distributions.

This one provides support for authenticating against ALT Domain.
Suggested-by: Andrey Cherepanov <cas@altlinux.org>

gdm3 and lightdm have their own startup services,
and can no longer be started via prefdm.
Other display managers still run through prefdm.

See-also: https://bugzilla.altlinux.org/36769

Removed in the upstream.

Suggested by cas@.

New version of alterator-auth uses sssd.

...and move lmms to disk.

Copy all features and lists from use/slinux/full and stop reusing it.

...following skypeforlinux platform support changes.

- Merge base and desktop
- Remove all specialized software from LiveCD
- Move biggest education applications to appropriate group lists

...because it conflicts with atril-gtk from use/simply/full.