Replace current toolbar with list-builder's multiselect toolbar

[Blackbaud-AlexKingman]

Addresses #13

[codecov]

Codecov Report

Merging #25 into master will decrease coverage by 0.46%.
The diff coverage is 100%.

@@            Coverage Diff             @@
##           master      #25      +/-   ##
==========================================
- Coverage     100%   99.53%   -0.47%     
==========================================
  Files          12       12              
  Lines         226      213      -13     
  Branches       42       39       -3     
==========================================
- Hits          226      212      -14     
- Misses          0        1       +1

Impacted Files	Coverage Δ
.../list-view-checklist/list-view-checklist.module.ts	100% <ø> (ø)	⬆️
...st-view-checklist/list-view-checklist.component.ts	100% <100%> (ø)	⬆️
...esources/list-view-checklist-resources-provider.ts	87.5% <0%> (-12.5%)	⬇️

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[Blackbaud-TrevorBurch]

A few things to think about :)

[Blackbaud-TrevorBurch]

LGTM