* show battery voltage, current, and power in live view header (the "totals")
* show battery current and power in extra card
* use soc and current precision in live view
* BatteryStats: do not knowingly publish invalid data: not all battery
providers know all values the base class manages. make sure to
prevent publishing invalid values.
Co-authored-by: Bernhard Kirchen <schlimmchen@posteo.net>
all total cards at the top of the live view go into the same row.
bootstrap will line-break after every third column/card, as the row
is row-cols-3.
the battery icon to the right of the project name in the header shall
have marging to said project name.
the rows in the live view now use class mt-0 to counteract bootstraps
negative margin for individual rows.
