Presentation of list of attributes in the Guidelines

[HelenaSabel]

See ticket #592. Council decided to go with the vertical compressed visualization and this should be implemented in CSS

To do list:

• [x] @joeytakeda to add the required CSS

[joeytakeda]

I've now updated the CSS (in https://github.com/TEIC/Stylesheets/pull/619/commits/ba2d56c8429609c98761765b19e6136193cd0175) and all tests are passing, so I am going to mark this as ready for review.