My table layout and collection info

This adds additional information in the my file listing that displays what collections a file is a part of.  There's also some cosmetic changes in the tables, such as not displaying the batch edit toggle in the collection view, and using chevrons instead of plus/minus signs.  This makes the UI more consistent and
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instead of doing a sprockets import (e.g. `*= require file-listing`) in sufia.css.scss change it to a sass import ( `@include 'file-listing';`). I think that will make them available.