Refactor the node spy page

Split the mqtt-related code out into a re-usable component, which will make it easier to use in other pages (eg the proof-of-concept web-based sbbsctrl), and allow the mqtt websocket ports to be entered via the website if they haven't been configured yet.

Split the javascript code out into separate .js files.

Rename the node spy with a 001 prefix to match the userlist prefix, so the "More" dropdown menu is alphabetized.

assigned to @rswindell

enabled an automatic merge when the pipeline for 8b48288c succeeds

merged

mentioned in commit 0544e033

mentioned in commit c5c36eb9