Merge pull request #944 from quartiq/feature/serial-settings-release #4437

Job	Run time
doc	4m 9s
style	1m 31s
compile (stable, false)	1m 13s
compile (beta, true)	1m 16s
hitl-trigger	0s
compile (nightly, nightly, true)	1m 19s
	9m 28s

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