UI: Override the context menu's copy option to copy a command

[ordabach]

What does this PR do?

Related to #3115.

Changed the code block CSS

PR Checklist

• Have you added an explanation of what your changes do and why you'd like to include them?
• Is the TravisCI build passing?
• Was the CHANGELOG.md updated to reflect the changes?
• Was the documentation framework updated to reflect the changes?
• Have you checked that you haven't introduced any duplicate code?

Testing Checklist

• Added relevant unit tests?
• Do all unit tests pass?
• Do all end-to-end tests pass?
• Any other testing performed?

  Tested by {Running the Monkey locally with relevant config/running Island/...}

• If applicable, add screenshots or log transcripts of the feature working

[codecov]

Codecov Report

Patch and project coverage have no change.

Comparison is base (46acd32) 72.34% compared to head (c543a23) 72.34%.

Additional details and impacted files

@@           Coverage Diff            @@
##           develop    #3152   +/-   ##
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  Coverage    72.34%   72.34%           
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  Files          462      462           
  Lines        13199    13199           
========================================
  Hits          9549     9549           
  Misses        3650     3650           

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[VakarisZ]

I don't like this solution. It clicks a button on copy. In that case, it would probably be better to just make the whole <code block a button instead. What happens if we want to change the button? or change its behavior?
The underlying problem is that whitespace is not preserved in the <code block. If we set white-space: pre-wrap; not only you will be able to copy-paste the code, but it will actually look like the command you will paste (it will be more readable)