Backend restarts should re-connect app to others #316
Description
If the DSP backend crashes, it will be restarted, which usually works (most crashes area caused by bad data). But the connections from the MFP app to other apps are not restored (or even tracked).
Need to add JACK callbacks to allow us to store the current state of connectivity, push it to the main process, and restore if the backend needs to be restarted. This can't prevent a dropout but will be a lifesaver life.