Support colored power tracks

[fqueze]

Profiles with many power tracks could benefit from coloring some of them.
Example profile with colored power tracks: https://share.firefox.dev/3tcfZ5t
Deploy preview.

[codecov]

Codecov Report

Attention: 35 lines in your changes are missing coverage. Please review.

Comparison is base (aa8089f) 88.32% compared to head (8da2e0a) 88.34%.
Report is 23 commits behind head on main.

❗ Current head 8da2e0a differs from pull request most recent head 7acc5c1. Consider uploading reports for the commit 7acc5c1 to get more accurate results

Additional details and impacted files

@@            Coverage Diff             @@
##             main    #4760      +/-   ##
==========================================
+ Coverage   88.32%   88.34%   +0.01%     
==========================================
  Files         300      301       +1     
  Lines       26808    26811       +3     
  Branches     7241     7244       +3     
==========================================
+ Hits        23679    23687       +8     
+ Misses       2917     2911       -6     
- Partials      212      213       +1     

Files	Coverage Δ
src/app-logic/constants.js	100.00% <100.00%> (ø)
src/components/timeline/TrackMemoryGraph.js	92.35% <100.00%> (ø)
src/components/timeline/TrackPowerGraph.js	89.44% <100.00%> (+0.11%)	⬆️
src/components/timeline/TrackCustomMarkerGraph.js	85.65% <66.66%> (+11.56%)	⬆️
src/components/shared/GraphColor.js	32.00% <32.00%> (ø)

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[canova]

Looks great, the colors really do make a difference. Also sorry for the delay on the review.

r+ with the GraphColor.js file moved to a better place, see my comment below.
I don't think it needs a re-review as it's a simple git mv with some imports changed, but let me know if you still want another look.

[canova]

Nice!

[canova]

I like the idea of extracting this to a shared place. But we usually put the React components to src/components/ directory. It looks like this file is a better fit for src/profile-logic directory. Could you move it there? Also we use snake case for non-component files. We can make it graph-color.