Make Asset Pipeline compatible with Chrome DevTools Autosave doesnt play nice with

The culprit of the problem is in the assets URLs. I cannot decipher a
path by its URL. For instance, /assets/main.css?body=1 could be either
app/assets/stylesheets/main.css, lib/assets/stylesheets/main.css
or vendor/stylesheets/main.css.

To fix it, we could either make URLs match their file path:

or introduce source-path query parameter:

Any help would be good.