feat: Steam's System settings and About this System like on SteamOS: OS name, Steamify as OS variant and version, serial number and Wi-Fi backend on a Steam Machine

lib/backend.sh

@@ -177,6 +177,7 @@ backend_apply() {
         if backend_run_component "$c" enable; then is_action "$c" || feature_record "$c" enable; else failed+=("$c"); fi
     done
     feature_record_unticked
+    os_version_refresh
     [[ " ${TO_DISABLE[*]} ${TO_ENABLE[*]} " =~ \ (gaming|single|boot|kpin)\  ]] && RESTART_FOR_LOGIN=true
     backend_event finished "\"failed\":$(json_list "${failed[@]}"),\"restart\":$(restart_needed && echo true || echo false)"
 }