Feature/3216 wccf map colors

[rfultz]

Summary

• Resolves Update key to match colors displayed in map #3216
• Resolves Decouple election year in URL from Where contributions come from #3231
• Updates the color scale to match the current Individual Contributions map.
• Limits the states' colors to those in the legend.
• Changes the legend text to be ranges rather than single values.

Impacted areas of the application

All of the changes are contained inside WCCF.

Screenshots

Related PRs

List related PRs against other branches:

branch	PR
feature/3204-wccf-indiv-contribs-btn	#3204 (related, not dependent)

How to test

• Pull, build, and run like normal (FEC_FEATURE_CONTRIBUTIONS_BY_STATE must be true)
• Change candidates and test values.
  • Warren, Elizabeth (Senate) will default to 2024 and offer all $0s. 2018 has data.
  • San Nicolas, Michael (House) has only a few values.
  • Perot (President) has a few $0s.
  • Mondale (President) has low numbers
  • Obama (President, 2008) has the highest numbers to date

Note: The color scale is based on the value of the state with the lowest value + 50% of the range between the lowest and highest states. The goal was to skew the scale so the 2-4 highest-raising (and highest population) states—more like showing the mode average more than the median average.

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[codecov-io]

Codecov Report

Merging #3229 into develop will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           develop   #3229   +/-   ##
=======================================
  Coverage     74.6%   74.6%           
=======================================
  Files          120     120           
  Lines         7160    7160           
  Branches       633     633           
=======================================
  Hits          5342    5342           
  Misses        1818    1818

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[patphongs]

Thanks @rfultz! Colors and legend look good

[JonellaCulmer]

All the colors appear to line up and the amounts fit appropriately within the define buckets.