Package branding-simply-linux: Information

- os-release.in: Update HOME_URL.
- menu: Fix helpers names.
- menu: Fix indentations in 50-xfce-applications.menu.
- xfce-settings: Drop fusion-icon from systray settings.
- xfce-settings: Replace datetime plugin with clock plugin.
- indexhtml: Update index.html page.
- build: Drop unused file.

- backgrounds10,xfce-settings: Move default_SL10 symlink.
- graphics: Add default.png and xdm.png in different sizes.
- backgrounds: Package Vladstudio backgrounds as separate subpackage.
- backgrounds10: Set Vladstudio "skyline" wallpaper as default.
- xfce-settings: Use symlink as default wallpaper.
- backgrounds10: Add new Vladstudio wallpapers for SL.
- xfce-settings: Use firefox on i586.
- spec: Cleanup defines of xfce4-settings helpers.
- indexhtml: Use %branding_add_conflicts macro.
- graphics,menu,indexhtml: Fix files permission mode.
- xfce-settings: Replace dm-tool with xfce4-session-logout.

- xfce-settings: Disable CSD for open/save dialogs.
- xfce-settings; Update audacious config (closes: #29014).
- indexhtml: Fix bugzilla.altllinux.org link.
- indexhtml: Fix basealt.ru links (closes: #42530).