Implement changes to data landing page and data menu that incorporate election & individual search

[jenniferthibault]

Implementing preliminary designs from https://github.com/18F/openFEC-web-app/issues/2197

• [ ] Review & refine microcopy & section titles @jameshupp
• [x] Adjust landing page
  • [x] Change format of candidate/committee search, add trending search modules (that are set manually)
  • [x] Add individual contributor search
  • [x] Add election search: If a district is entered, "View results" go straight to election page. If no district is entered, "View results" navigates to election search results page
  • [x] Add trending election module (that are set manually)
  • [x] Add cards for advanced data
    • [x] Add new icon for loans @jenniferthibault
    • [x] Add new icon for bulk data @jenniferthibault
  • [ ] Add slab with link to API

Designs

[jenniferthibault]

@noahmanger could you review the completion criteria above ?

[noahmanger]

Updated completion criteria to reflect my last conversation with @jenniferthibault . We agreed that the nav updates aren't necessary for this first version.

[noahmanger]

Resolved by https://github.com/18F/openFEC-web-app/pull/2243