feat(clipboard): remove textarea from clipboard copy

[dgutride]

Fixes #1816

What:

Additional issues:

[patternfly-build]

PatternFly-React preview: https://1840-pr-patternfly-react-patternfly.surge.sh

[codecov-io]

Codecov Report

Merging #1840 into master will increase coverage by <.01%.
The diff coverage is 75%.

@@            Coverage Diff            @@
##           master   #1840      +/-   ##
=========================================
+ Coverage    82.8%   82.8%   +<.01%     
=========================================
  Files         609     609              
  Lines        6711    6712       +1     
  Branches       81      81              
=========================================
+ Hits         5557    5558       +1     
  Misses       1123    1123              
  Partials       31      31

Flag	Coverage Δ
#patternfly3	84.87% <ø> (ø)	⬆️
#patternfly4	79.63% <75%> (ø)	⬆️
#patternflymisc	95.68% <ø> (ø)	⬆️

Impacted Files	Coverage Δ
...re/src/components/ClipboardCopy/ExpandedContent.js	83.33% <75%> (+3.33%)	⬆️

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[mcoker]

If you edit the content in the expandable example, if you start adding content anywhere other than the very beginning of the screen, after you type 1 character, the cursor moves back to the beginning of the expandable content.

[dlabaj]

LGTM

[dlabaj]

You have conflicts

[redallen]

Just tried Github's web browser merging since the merge was super easy. Let's hope it works!

Edit: It worked. Magical.