JS lint cleanup for static/scripts/S3 & related.

Here's the squashed version of these:

Convert UTF-16 js file to UTF-8 so it can be linted. Lint cleanup of js files in static/scripts/S3. Allow vulnerability to at least not ticket if there's no data. Remove obsolete s3.dataTables.new.js as per Fran.

My merge tool is convinced there were some whitespace diffs (tabs vs. spaces, perhaps, and some whitespace at ends of lines) in a few lines in the restored filterURL, some of which had lint mods. So you might see diffs on a few lines that don't have lint mods.