feat(legacy-plugin-chart-chord): control panel

[suddjian]

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[rusackas]

LGTM

[codecov]

Codecov Report

Merging #481 into master will not change coverage.
The diff coverage is n/a.

@@           Coverage Diff           @@
##           master     #481   +/-   ##
=======================================
  Coverage   22.38%   22.38%           
=======================================
  Files         270      270           
  Lines        6562     6562           
  Branches      608      608           
=======================================
  Hits         1469     1469           
  Misses       5056     5056           
  Partials       37       37           

Impacted Files	Coverage Δ
plugins/legacy-plugin-chart-chord/src/index.js	0.00% <ø> (ø)

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