refactor: remove lodash findkey

[brenopolanski]

Summary

Checklist

• Documentation (if necessary)
• Tests (if necessary)
• Ready to be merged

[codecov]

Codecov Report

Merging #1894 into develop will increase coverage by 0.00%.
The diff coverage is 83.33%.

@@           Coverage Diff            @@
##           develop    #1894   +/-   ##
========================================
  Coverage    58.88%   58.88%           
========================================
  Files          371      371           
  Lines         9305     9306    +1     
  Branches      1920     1920           
========================================
+ Hits          5479     5480    +1     
  Misses        3600     3600           
  Partials       226      226           

Impacted Files	Coverage Δ
...c/renderer/components/Selection/SelectionTheme.vue	40.00% <0.00%> (-10.00%)	⬇️
...nderer/components/Transaction/TransactionModal.vue	30.07% <100.00%> (+1.06%)	⬆️

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