Racial Disparities charts UI

[macfarlandian]

Description of the change

Adds the chart UI (including filters, data download, and methodology) for all sections of the Racial Disparities narrative page.

Notable:

• refactored some of the chart UI to uncouple it from the Metric class and use it here
• refactored the .zip download functionality into a reusable function
• replaced modularized lodash with the mothership because I realized the modular packages were deprecated and out of date (tried to use lodash.pick and discovered it was way behind current functionality)
• changed named dataviz colors from Map to plain object because maps are annoying to work with in Typescript
• changed the "focus color" in some charts per a conversation with Juan

Type of change

• Bug fix (non-breaking change that fixes an issue)
• New feature (non-breaking change that adds functionality)
• Breaking change (fix or feature that would cause existing functionality to not work as expected)
• Configuration change (adjusts configuration to achieve some end related to functionality, development, performance, or security)

Related issues

Closes #320

Checklists

Development

These boxes should be checked by the submitter prior to merging:

• Manual testing against realistic data has been performed locally

Code review

These boxes should be checked by reviewers prior to merging:

• This pull request has a descriptive title and information useful to a reviewer
• This pull request has been moved out of a Draft state, has no "Work In Progress" label, and has assigned reviewers
• Potential security implications or infrastructural changes have been considered, if relevant

[coveralls]

Pull Request Test Coverage Report for Build 647224664

• 68 of 73 (93.15%) changed or added relevant lines in 12 files are covered.
• No unchanged relevant lines lost coverage.
• Overall coverage increased (+0.2%) to 72.958%

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Changes Missing Coverage	Covered Lines	Changed/Added Lines	%
spotlight-client/src/RacialDisparitiesNarrativePage/RacialDisparitiesNarrativePage.tsx	3	4	75.0%
spotlight-client/src/VizControls/VizControls.tsx	12	13	92.31%
spotlight-client/src/contentModels/downloadData.ts	8	9	88.89%
spotlight-client/src/contentModels/RacialDisparitiesNarrative.ts	13	15	86.67%

Totals
Change from base Build 644212328:	0.2%
Covered Lines:	2650
Relevant Lines:	3520

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💛 - Coveralls

[daschi]

This page is so impactful and well done 💯

[daschi]

I'm curious why isLoading is initially unset instead of set to true, I think we may be setting it initially to true in lantern and I was wondering if you noticed unintended behavior with that?

[macfarlandian]

yeah this came up way back when I was first setting up the data models. it basically serves as a signal that a fetch has not been initiated yet. all the models follow this convention ... there wasn't necessarily a problem with doing it the other way, this just seemed like a good idea at the time