- Set default screen size to 'small'
- Update React to match other apps
- Add Hero component
  - Add background
  - Add about link and intro
  - Add workflow loader

- Filter workflows response to only include requested fields
- Filter workflows response to only include incomplete workflows
- Move translations request to work in series, as `activeWorkflows` may
  include redundant translations and these can get big
- Create a map of display names, rather than do an array search
  for performance

* Make Hero widget responsive with SSR

- Install @artsy/fresnel
- Move grommet theme merger to its own helper
- Add fresnel helper components
- Add media queries to Hero widget
- Update tests

* Update packages/app-project/src/helpers/theme/README.md

Co-Authored-By: Jim O'Donnell <jim@zooniverse.org>

* Add per-layout tests