- Use bright Education icon suitable both for light and dark backgrounds

- Set yellow labels for gfxboot
- Use predefined boot.png with logo for grub
- Set bright color for menubar in grub

- Do not require polkit-gnome
- Set SimpleSL icon theme in XFCE settings

- Rebuild with conflict with branding-xalt-kworkstation

- adaptation for ALT Workstation 8.0

- Update copyright years, fix VK group URL and update company address
- Fix button gluing in web interface
- Fix package name with Droid fonts
- Generate image for selection bar in GRUB menu from specified color

- Update copyright years, fix VK group URL and update company address
- Fix button gluing in web interface
- Fix package name with Droid fonts
- Generate image for selection bar in GRUB menu from specified color

This reverts commit d9a178bb.

ALT bug #29881.

Celestia was removed from SL.
And no use in this desktop file anyway.