Add button to copy track config in About track dialog

[cmdcolin]

Allows you to copy the JSON to clipboard using a button click in the about track dialog

May help with e.g. #2889

This type of feature requires otherwise going into the chrome dev console to try to copy it out. This feature can allow a little "lightweight" admin server type functionality since you can copy track configs back into your config.json manually.

[codecov]

Codecov Report

Merging #3017 (845c11c) into main (c64b555) will decrease coverage by 0.00%.
The diff coverage is 18.18%.

@@            Coverage Diff             @@
##             main    #3017      +/-   ##
==========================================
- Coverage   61.33%   61.32%   -0.01%     
==========================================
  Files         584      584              
  Lines       26589    26596       +7     
  Branches     6439     6442       +3     
==========================================
+ Hits        16309    16311       +2     
- Misses       9973     9978       +5     
  Partials      307      307              

Impacted Files	Coverage Δ
packages/core/ui/AboutDialog.tsx	66.00% <18.18%> (-6.10%)	⬇️

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[rbuels]

I like this. Can be useful in a wide variety of scenarios that the admin server doesn't cover