like in branding-alt-workstation

- add /etc/altlinux-release to package (fixed ALT#41741).
- update Provides.

- Lighten the background of list boxes (closes: 41514).
- Fix: Don't specify extra horizontal margins for inputs in
  alterator-listbox tables.
- Fix: Don't restrict the width of the top panel buttons.

To the pity, it seems there is currently no way to alter the color
that is used to highlight the currently selected option:

* https://stackoverflow.com/questions/17698110/how-to-change-color-of-selection-in-select-option

* https://stackoverflow.com/questions/26392014/change-color-of-selected-option-in-html-select-input

The horizontal paddings of a table cell and of the input inside it
aren't combined properly resulting in inputs that are wider than the
surrounding cell.

Some buttons should be wider in accordance with their text.

- year auto-substitution in (c)

- release up

- colors changed

- images and bootsplash fixed

Don't preserve previously installed /etc/altlinux-release:
we are keep BUILD_ID in /etc/os-release now, it is enough.

And require alt-os-release filetrigger.

- images and bootsplash changed

- version bump
- 'Next' button size fixed

- alternatives priorities changed

- product version fixed

- reduced black border for focused buttons

- version bump

- sync spec with branding-alt-workstation
- Package system-logo.png for Plymouth
- add black border for focused buttons

# Conflicts:
#	Makefile.in

# Conflicts:
#	branding.spec

Well, rm is not a macro...
This fixes commit 30b2d9fa3cdbe0836d74475dd022e8aaf6f52be8.

This fixes commit 57d02d3a019e6b749326f09ea8ad9f046b0d93b0.