fix: explore warnings cleanup

[diegomedina248]

SUMMARY

Changes:

• Removes a duplicated translation application (table/handlebars plugins). The translations applied were exactly the same, so kept one.
• PropTypes miss configuration
• CSS properties from :nth-x to :nth-of-type (same end result, but cleans some warnings there)

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

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TESTING INSTRUCTIONS

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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

[codecov]

Codecov Report

Merging #20864 (6308af9) into master (9bf7ed5) will decrease coverage by 0.07%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #20864      +/-   ##
==========================================
- Coverage   66.33%   66.25%   -0.08%     
==========================================
  Files        1756     1756              
  Lines       66769    66928     +159     
  Branches     7059     7101      +42     
==========================================
+ Hits        44288    44342      +54     
- Misses      20684    20771      +87     
- Partials     1797     1815      +18     

Flag	Coverage Δ
javascript	51.89% <ø> (-0.09%)	⬇️

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

Impacted Files	Coverage Δ
...tend/plugins/plugin-chart-handlebars/src/consts.ts	66.66% <ø> (-8.34%)	⬇️
...lugin-chart-handlebars/src/plugin/controlPanel.tsx	50.00% <ø> (-16.67%)	⬇️
...nd/plugins/plugin-chart-table/src/controlPanel.tsx	45.58% <ø> (-0.79%)	⬇️
...end/src/components/PageHeaderWithActions/index.tsx	90.00% <ø> (ø)
...ntend/src/explore/components/ExploreChartPanel.jsx	69.01% <ø> (ø)
.../explore/components/ExploreViewContainer/index.jsx	52.19% <ø> (ø)
.../src/explore/components/controls/SelectControl.jsx	60.71% <ø> (ø)
superset-frontend/src/views/components/Menu.tsx	50.00% <ø> (ø)
superset-frontend/src/views/menu.tsx	0.00% <ø> (ø)
...components/DashboardBuilder/DashboardContainer.tsx	40.00% <0.00%> (-32.23%)	⬇️
... and 20 more

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[zhaoyongjie]

Thanks for the clear-up. LGTM