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
:sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: :sunny: :rainbow: 
Isn't this already defined here: https://github.com/twbs/bootstrap-sass/blob/master/assets/stylesheets/bootstrap/_variables.scss#L17