Disable text search match index

[jasonLaster]

Associated Issue: #2355

Summary of Changes

• removes search.results because it is too slow
• the UI now just shows the number of results
• we should build a better algorithm for getting the match location

[codecov]

Codecov Report

Merging #3008 into master will increase coverage by 0.25%.
The diff coverage is 0%.

@@            Coverage Diff             @@
##           master    #3008      +/-   ##
==========================================
+ Coverage   63.64%   63.89%   +0.25%     
==========================================
  Files          72       72              
  Lines        2517     2504      -13     
  Branches      514      511       -3     
==========================================
- Hits         1602     1600       -2     
+ Misses        915      904      -11

Impacted Files	Coverage Δ
src/utils/editor/source-search.js	9.83% <0%> (+0.81%)	⬆️
src/test/tests-setup.js	100% <0%> (ø)	⬆️

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[wldcordeiro]

Looks good to me, that bit of code had issues and I support coming back to this with a more efficient solution later.