[MergeDupsCompleted] Give different display for deletions

[imnasnainaec]

Resolves #3112

To review: Evaluate the new look in "Data Cleanup" > "You've Completed:" in various Merge Duplicate instances, including one where a single word was deleted and one where multiple words were deleted.

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This change is 

[codecov]

Codecov Report

Attention: Patch coverage is 66.66667% with 4 lines in your changes missing coverage. Please review.

Project coverage is 74.63%. Comparing base (f88891f) to head (80e40f0).
Report is 36 commits behind head on master.

Files with missing lines	Patch %	Lines
src/goals/MergeDuplicates/MergeDupsCompleted.tsx	66.66%	4 Missing ⚠️

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3186      +/-   ##
==========================================
+ Coverage   74.41%   74.63%   +0.22%     
==========================================
  Files         279      279              
  Lines       10677    10683       +6     
  Branches     1288     1289       +1     
==========================================
+ Hits         7945     7973      +28     
+ Misses       2369     2349      -20     
+ Partials      363      361       -2     

Flag	Coverage Δ
backend	83.97% <ø> (+0.18%)	⬆️
frontend	66.43% <66.66%> (+0.26%)	⬆️

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[jasonleenaylor]

Reviewed 2 of 3 files at r1, 1 of 1 files at r2, 1 of 1 files at r3, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)