Also disable battery completely from defaults/option in desktop linux as it always return 0%
Update shellcheck and shfmt to the latest version. Fixes <https://github.com/koreader/koreader/issues/5152>. Btw, you can apply shellcheck suggestions with a command like: ``` shellcheck --include=SC2250 -f diff *.sh | git apply ```
* Add support for Debian packages * SDL: add device probe
