fix(plugin-chart-echarts): boxplot throw error in the dashboard

[stephenLYZ]

SUMMARY

The reason is the controlPanelState may be null in the dashboard.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• Required feature flags:
• Changes UI
• Includes DB Migration (follow approval process in SIP-59)
  • Migration is atomic, supports rollback & is backwards-compatible
  • Confirm DB migration upgrade and downgrade tested
  • Runtime estimates and downtime expectations provided
• Introduces new feature or API
• Removes existing feature or API

[zhaoyongjie]

LGTM, Thanks for the fix! IMO, we should find out why the controlPanel logic took the process in Dashboard.

[codecov]

Codecov Report

Merging #21661 (40ce61c) into master (9dd102f) will decrease coverage by 0.00%.
The diff coverage is 0.00%.

@@            Coverage Diff             @@
##           master   #21661      +/-   ##
==========================================
- Coverage   66.83%   66.83%   -0.01%     
==========================================
  Files        1798     1798              
  Lines       68823    68820       -3     
  Branches     7333     7331       -2     
==========================================
- Hits        45996    45993       -3     
  Misses      20949    20949              
  Partials     1878     1878              

Flag	Coverage Δ
javascript	53.16% <0.00%> (-0.01%)	⬇️

Flags with carried forward coverage won't be shown. Click here to find out more.

Impacted Files	Coverage Δ
...et-ui-chart-controls/src/shared-controls/index.tsx	57.14% <ø> (ø)
...t-ui-chart-controls/src/shared-controls/mixins.tsx	33.33% <ø> (ø)
...s/plugin-chart-echarts/src/BoxPlot/controlPanel.ts	5.55% <0.00%> (ø)
...ugins/plugin-chart-echarts/src/Gauge/buildQuery.ts	66.66% <0.00%> (-8.34%)	⬇️
...s/plugin-chart-handlebars/src/plugin/buildQuery.ts	100.00% <0.00%> (ø)

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