How to correctly show requests handled by service worker

[gitgrimbo]

HAR Viewer will currently display two requests for a request that is intercepted by a service worker and results in a network request.

There appears to be no simple way to identify a relationship between these two requests. So it would be difficult to either only show one request in the waterfall, or show both as a connected/related pair.

See https://stackoverflow.com/questions/52502992/har-file-access-size-column-entries-from-chrome-dev-tools-network-tab/52920664#52920664