Reported on an Ultrabeam over USB: the port could not be chosen from the
dropdown, and the panel would not scroll.
That field was a Combobox — a list you can also type into — chosen so the
port of an adapter currently UNPLUGGED could still be configured. It is
now the same Select every other serial device in OpsLog uses, the one that
demonstrably works. The case it was built for is kept differently: a
configured port that is no longer detected is added to the list, so it
stays selected and visible instead of vanishing when the adapter is out.
Also hardened the Test button's guard, which called .trim() straight on
the port and the host. A settings object without them — an older build, a
save that landed short — throws there DURING RENDER, and a panel that
throws while rendering is exactly a panel with a dead dropdown that will
not scroll. Whether or not that is what this operator hit, it is a way to
produce both symptoms at once and it costs nothing to remove.
rouggy
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