SF-3743 Fix checking slowdown when a project has many questions

[pmachapman]

This PR addresses speed issue in community checking by adding an index to the questions in IndexedDB, and by modifying change detection to push for the checking component and checking overview component.

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This change is 

[codecov]

Codecov Report

❌ Patch coverage is 91.66667% with 3 lines in your changes missing coverage. Please review.
✅ Project coverage is 81.33%. Comparing base (a3e53c4) to head (fccb285).
✅ All tests successful. No failed tests found.

Files with missing lines	Patch %	Lines
...g/checking-overview/checking-overview.component.ts	88.23%	2 Missing ⚠️
...pp/src/app/checking/checking/checking.component.ts	93.33%	1 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3754      +/-   ##
==========================================
+ Coverage   81.32%   81.33%   +0.01%     
==========================================
  Files         620      620              
  Lines       39086    39115      +29     
  Branches     6375     6373       -2     
==========================================
+ Hits        31787    31815      +28     
- Misses       6316     6317       +1     
  Partials      983      983              

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[Nateowami]

My testing confirms a dramatic performance improvement. Thanks for tracking this down. IndexedDB indexes weren't even on my radar.