Adopt SkyUIConfigService

[Blackbaud-SteveBrush]

Addresses: https://github.com/blackbaud/skyux-grids/issues/30

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How to test

• Clone the repo and checkout the branch
• Type npm i --no-save @blackbaud-internal/skyux-lib-ui-config-service
• Open skyuxconfig.json and set name to "email" and auth to true.
• Open app-extras.module.ts and import the following:

import { SkyUIConfigService } from '@skyux/core';
import { SkyAppUIConfigService } from '@blackbaud-internal/skyux-lib-ui-config-service';

• Open app-extras.module.ts and add the following provider:

{
  provide: SkyUIConfigService,
  useClass: SkyAppUIConfigService
}

• Open grid-visual.component.html and add the attribute settingsKey="new-email-designer" to the <sky-grid> component.
• Serve the SPA.
• Change the order of the grid's columns and refresh the page. The order should be preserved.

[codecov-io]

Codecov Report

Merging #31 into master will increase coverage by 0.4%.
The diff coverage is 100%.

@@            Coverage Diff            @@
##           master      #31     +/-   ##
=========================================
+ Coverage    99.4%   99.81%   +0.4%     
=========================================
  Files          10       10             
  Lines         508      542     +34     
  Branches       74       82      +8     
=========================================
+ Hits          505      541     +36     
+ Misses          3        1      -2

Impacted Files	Coverage Δ
src/app/public/modules/grid/grid.component.ts	100% <100%> (+0.54%)	⬆️
src/app/public/modules/grid/grid.module.ts	100% <100%> (ø)	⬆️

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[Blackbaud-AlexKingman]

LGTM