Fixed an issue that caused the indicator of an open application to overlap with its icon

See merge request !1

- gnome-settings: set some nautilus settings

- gnome-settings: dash-to-dock extension: set click-action

- gnome-settings: set kgx as default terminal
- gnome-settings: set favorite-apps

gnome-settings: set favorite-apps

- changed default wallpaper
- added new wallpapers

- Initial build for Sisyphus. (Forked from branding-alt-server)

- copy licenses from distro-licenses

Suggested-by: Anton Midyukov <antohami@altlinux.org>

- use the Basealt LLC logo for About system

See https://bugzilla.altlinux.org/39847

- update year for copyright to 2023
- set codename to Mendelevium

- import contents of indexhtml from Alexey Osotov

- add /usr/share/install3/lightdm-gtk-greeter.conf
  to change the keyboard layout in greeter
- remove wrong web links