Persistent data not being saved

[drmibell]

@cflurin Exactly right. Both SIGINT on a mac and node-red-stop on a pi should produce an orderly shutdown of NR. According to a previous discussion,

@knolleary

the filesystem context plugin flushes its contents as part of its closing down

This does not seem to happen. @Paul-Reed observed that context that is supposed to persist does not, and I was just offering another example.