Use @testing-library on AppBar, IconButtonWithTooltip, WordCard

[imnasnainaec]

This change is 

[codecov]

Codecov Report

All modified and coverable lines are covered by tests ✅

Project coverage is 74.38%. Comparing base (5dfb1a1) to head (8828401).
Report is 1 commits behind head on master.

Additional details and impacted files

@@            Coverage Diff             @@
##           master    #3328      +/-   ##
==========================================
+ Coverage   74.35%   74.38%   +0.02%     
==========================================
  Files         285      285              
  Lines       11049    11057       +8     
  Branches     1350     1350              
==========================================
+ Hits         8216     8225       +9     
  Misses       2445     2445              
+ Partials      388      387       -1     

Flag	Coverage Δ
backend	83.72% <ø> (ø)
frontend	66.18% <100.00%> (+0.06%)	⬆️

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[jasonleenaylor]

Reviewed 4 of 18 files at r1, 14 of 14 files at r2, all commit messages.
Reviewable status: complete! all files reviewed, all discussions resolved (waiting on @imnasnainaec)