Investigate Error Handling of chrome.runtime.connect

[sabjorn]

the error handling for chrome.runtime.connect throughout the extension may not actually be useful.

example: https://github.com/sabjorn/BandcampEnhancementSuite/blob/38341fc2af265f957349620d074999a9b8d6d1a5/src/waveform.js#L26-L35

The documentation seems to point to this method as not throwing errors...