Backport new version to p9 branch.

Set default size for root filesystem to 50 GiB.

Backport new version to p9 branch.
Do not build as noarch.

Remove orphained hook for lightdm theme set.
Add all needed installer-features from mkimage-profiles.
Update enabled and disabled services from mkimage-profiles.

Build package as noarch.

Exclude armh from build architectures.
Remove autreq of installer-stage2.
Fix License according to SPDX.
Remove unpackaged files.
Package volumes-profile-education as separate package.

Do not use deprecated installer-feature-symlinks-from-sbin.

Enable cups-browsed service.

Create new installer based on installer-distro-junior.
Make autopatrition script from volumes-profile-lite.
Increase size of / to 28G.