Fix #152: adding copy button to about

[araujoarthur0]

Related issue

#152

Context / Background

• Briefly explain the purpose of the PR by providing a summary of the context

Adding a copy button to copy the contents of the about section into the clipboard.
Very simple commit, adds a handler to the onSuccess of the About dialog Promise, that handles the pressing of the copy button. The clipboard module is used, from electron.

[codecov]

Codecov Report

Merging #230 into master will decrease coverage by 0.24%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master     #230      +/-   ##
==========================================
- Coverage   35.70%   35.46%   -0.25%     
==========================================
  Files          11       11              
  Lines         591      595       +4     
  Branches      101      102       +1     
==========================================
  Hits          211      211              
- Misses        337      340       +3     
- Partials       43       44       +1     

Impacted Files	Coverage Δ
main.js	0.00% <0.00%> (ø)

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