Improve consistency of label visual styles

Created by: gracewashere

Problem:

A resource's show page and edit page had different styles for their field labels, which worked against the cohesion of the site.

Solution:

• Extract a data-label mixin
• Use the mixin in the form, the attribute label (show page), and in the index table cells

Minor changes:

• Improve BEM-iness of form-field-has-many
• Break up _show.sass into component-related stylesheets
• Improve spacing under page header

Preview

"Show" page

"Edit" page