Fix older firmware in battery 'zero' mode treated as standby due to missing permissions#587

DCSBL merged 2 commits intomainhomewizard/python-homewizard-energy:mainfrom

fix-nill-permission-treaded-as-standbyhomewizard/python-homewizard-energy:fix-nill-permission-treaded-as-standbyCopy head branch name to clipboard