Upstream merge log

[rusefillc]

https://github.com/dron0gus/wideband/tree/backup.master-2023-07-14 created as a backup

[rusefillc]

clean-up activity: dropped 3aa12c6 and 9a8ce8d since these seem to cancel each other out

[rusefillc]

clean-up activity: squashed 82f5a9d and 77082c3 since those are two parts of same change

[rusefillc]

clean-up activity: reordered commits

• misc
• heater closer together
• livedata closer together

[rusefillc]

clean-up activity:
squashed three commits related to "livedata: show per-channel heater supply voltage" e5aa4ab a1ceca9 912936c