USB HID Support on Pico!

Ok, I'll update the module. Very interesting that a plug in device can
crash the UI! :o

Yes, indeed. OTH, it could do all kind of weird things. Have to look at the logs to see if someone complained.

As you say, I doubt the clipping/offset is anything Pico-related - the
data sent from the Pico obviously doesn't have anything done to it (it
works fine on Linux), so I wonder whether your Macs have some kind of
'calibration' that's applied?

Probably. The irritating thing is, that I have no idea what and where. The other Macs work fine. The "less offset" things was due to a param change. I have just one strange Mac in the group :)

Very strange about the keyboard example and the context menu - I
actually tried that on a Mac and it worked great.

Low sample count issue :)