Components: Use Lodash's find in place of Array#find

[aduth]

Regression introduced in: #3281
Related: #746

This pull request seeks to resolve errors which occur in IE11 when attempting to use the inserter. The root cause is using array prototype methods which are neither supported nor polyfilled in IE11 (specifically, Array#find). The changes here propose to use the Lodash _.find equivalent, also leveraging object shorthand predicates.

Testing instructions:

Repeat testing instructions from #3281

[codecov]

Codecov Report

Merging #3502 into master will not change coverage.
The diff coverage is 50%.

@@           Coverage Diff           @@
##           master    #3502   +/-   ##
=======================================
  Coverage   34.61%   34.61%           
=======================================
  Files         260      260           
  Lines        6757     6757           
  Branches     1226     1226           
=======================================
  Hits         2339     2339           
  Misses       3728     3728           
  Partials      690      690

Impacted Files	Coverage Δ
editor/components/inserter/group.js	55% <0%> (ø)	⬆️
components/tab-panel/index.js	93.75% <100%> (ø)	⬆️

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