Vim control lines were re-introduced or not entirely cleaned up.
This nukes them again.
Removing from the rest of js, caps, chrome, config, devtools, docshell,
image, intl. More to come.
Since these are just interpreted comments, there's 0 impact on actual code.
This removes all lines that match /* vim: set(.*)tw=80: */ with S&R -- there are
a few others scattered around which will be removed manually in a second part.
Saving JSON from the viewer was broken, because the message passed to
the `saveToFile` function contained unneeded data. This bug was
introduced by 23e68227a2e3f3946fa4fd5589f338e6b36a6e56.