* VE.Direct: remove polling interval
the polling interval was meant to limit the amount of MQTT updates.
however, that is already controlled by the global MQTT publish interval.
the removed interval was instead used to limit polling of the VE.Direct
UART for incoming data.
the Victron device sends data unsolicited. the VeDirectFrameHandler does
not implement any polling mechanism. no data is ever sent to the Victron
device.
what the removed polling interval did was cause a buffer overrun of the
HardwareSerial class, since the incoming data was not processed in time.
so every five seconds, we read a whole valid VE.Direct frame, plus some
old data, which was not a whole frame, leading to VE.Direct error
messages to pop up.
with the polling interval removed, no framing errors are reported, and
instead we gain new data from the charge controller approximately ever
two seconds -- for free.
* VE.Direct: change texts to correct VE.Direct capital letters
* VE.Direct: improve "UpdatesOnly" switch labels
especially since the publish interval setting is gone, the label makes
it hard to comprehend what the switch does. update the texts to better
explain what the switch is used for.
use the same text on the VE.Direct info view.
* VE.Direct: use StatusBadge on info view
there were custom badges to indicate the VE.Direct settings. replace
those by the common StatusBadge to make then look the same as the other
badged on the info views.
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