Bangle.js 2 / Linux Mint 21.3: Can't leave selected watchface, can't connect via serial to somehow disable the watchface

Next time I need to use the docs, I'll watch out for things that may seem unclear to someone inexperienced like myself.

Thanks! There's a lot of stuff for me to maintain there, so if you (or anyone else) notices anything that could do with a tweak (or somewhere where we should link to other info) then please mention it!