Message tracing in NR5

[gregorius]

@KristopherLeads

auto-trigger in place to turn off the trace

Fyi, with 0.14.0 I've now added a fail-safe that deactivates the tracing if >100 msg per second are being received. That is configured for both clamp more and select-and-trace mode. The limit can be overridden in the editor, how to do this is described in the readme.