It is not used anymore.

This reverts commit 1ad36d72.
It causes issues with tray icons.

- Drop altlinux-menus requires.
- Rename and fix fusion-icon.desktop for autostart.
- backgrounds: Replace slinux_spring_*.png with slinux_spring_*.jpg.

- indexhtml: change link to user manual (by Artem Zolochevskiy).
- menu: Drop unneeded desktop files.
- etcscel: Changed display type of xkb plugin.

Drop driconf.desktop, eiskaltdc.desktop,
sonata.desktop, Kino.desktop, audacity.desktop.

Use letters instead of flags.

- new desktop files for libreoffice and xkill (by Alexandra Panyukova).
- new images for installer steps (by Alexandra Panyukova).
- menu subpackage added (by Alexandra Panyukova).
- trying to replace some elements in bootloader (by Alexandra Panyukova).
- style changes in grub theme (by Alexandra Panyukova).
- trying to read images less times in bootloader (by Alexandra Panyukova).
- new menu items (by Alexandra Panyukova).
- new grub theme (by Alexandra Panyukova).
- etcskel: Drop xfce4-terminal.desktop.
- etcskel: Drop ristretto.desktop.
- Show gnome-screensever preferences in xfce4 settings.
- etcskel: Drop nm-applet.desktop.
- making grey points in menu from the beginning (by Alexandra Panyukova).
- testing default version of menu.inc (by Alexandra Panyukova).