this change tries to achieve a pleasing look of input forms by
right-aligning the texts of labels. the input form now looks similar
to a table, achieving a cleaner look, especially for forms where the
labels have varying text lenghts.
the absorption and float voltage setting is retrieved from connected
Victron Ve.Direct MPPTs using the HEX protocol. the values are
displayed in the live view, published to MQTT, and added to Home
Assistent auto-discovery.
This changes the custom current limit so the custom limit is only
applied when any of:
- SoC is valid and not ignored and SoC < threshold
- Voltage is valid and Voltage < threshold
- Voltage is invalid
Independently, if "Use Battery-Reported limit" is enabled and valid, it
is applied (unless a lower custom limit already was applied).
the configuration write guard is now required when the configuration
struct shall be mutated. the write guards locks multiple writers against
each other and also, more importantly, makes the writes synchronous to
the main loop. all code running in the main loop can now be sure that
(1) reads from the configuration struct are non-preemtive and (2) the
configuration struct as a whole is in a consistent state when reading
from it.
NOTE that acquiring a write guard from within the main loop's task will
immediately cause a deadlock and the watchdog will trigger a reset. if
writing from inside the main loop should ever become necessary, the
write guard must be updated to only lock the mutex but not wait for a
signal.
a battery temperature value measured by a Victron smart battery sense
and communicated to a connected Victron MPPT charge controller will now
appear in the live view card.
If the default type is an int, setting to a fractional value is not possible.
Presumably this is because in
`target.DischargeCurrentLimit = source["discharge_current_limit"] | BATTERY_DISCHARGE_CURRENT_LIMIT;`
the JSON library uses the default to force the expected type and on type mismatch the default is used.
As per https://arduinojson.org/v7/api/jsonvariant/or/:
`defaultValue: the value to return if the JsonVariant is null or incompatible with the requested type.`
