store current color selections in local browser storage

[interim17]

Time estimate or Size

x-small

Problem

Closes #580, advances #511

Solution

Store user color selections as UIDisplayData in local storage in the browser.

Behavior is limited in current scope, no need to store defaults, and no application of any stored settings.

Whenever a user applies a color change, store a snapshot of the current color selections in local storage, using simularium file name as key.

Steps to Verify:

1. Open dev tools Application tab, storage.
2. Make a color change, key: value of current trajectory name and current color selections should be in local storage.

[toloudis]

is there code to load them back in?

[github-actions]

Coverage report

St.❔	Category	Percentage	Covered / Total
🟡	Statements	66.24% (-0.1% 🔻)	675/1019
🟡	Branches	65.31%	96/147
🔴	Functions	35%	91/260
🟡	Lines	64.62% (-0.1% 🔻)	601/930

Test suite run success

121 tests passing in 7 suites.

Report generated by 🧪jest coverage report action from e87d5d3