fix(dataset): modal sql editor error

[stephenLYZ]

SUMMARY

This pr fixes the problem that when typing into the SQL editor, it always appends the old value to the end of the new value, causing it to grow exponentially.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

before

2021-12-01.9.21.33.mov

after

2021-12-01.9.19.38.mov

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

[codecov]

Codecov Report

Merging #17612 (c37462b) into master (2f2e8fe) will decrease coverage by 0.15%.
The diff coverage is 63.88%.

❗ Current head c37462b differs from pull request most recent head 9271265. Consider uploading reports for the commit 9271265 to get more accurate results

@@            Coverage Diff             @@
##           master   #17612      +/-   ##
==========================================
- Coverage   68.54%   68.39%   -0.16%     
==========================================
  Files        1601     1602       +1     
  Lines       65258    65352      +94     
  Branches     6963     6994      +31     
==========================================
- Hits        44734    44696      -38     
- Misses      18634    18770     +136     
+ Partials     1890     1886       -4     

Flag	Coverage Δ
hive	?
javascript	57.14% <61.61%> (+0.07%)	⬆️
presto	?

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

Impacted Files	Coverage Δ
...gacy-preset-chart-nvd3/src/DistBar/controlPanel.ts	38.46% <ø> (ø)
...nd/plugins/legacy-preset-chart-nvd3/src/NVD3Vis.js	0.00% <0.00%> (ø)
...frontend/src/dashboard/components/Header/index.jsx	59.02% <ø> (ø)
...nfigModal/FiltersConfigForm/getControlItemsMap.tsx	68.18% <ø> (ø)
superset/db_engine_specs/presto.py	83.50% <ø> (-6.48%)	⬇️
...qlLab/components/EstimateQueryCostButton/index.tsx	34.48% <11.11%> (ø)
superset-frontend/src/CRUD/Field.tsx	84.21% <33.33%> (-9.54%)	⬇️
...onfigModal/FiltersConfigForm/FiltersConfigForm.tsx	56.37% <37.50%> (+0.45%)	⬆️
superset/dashboards/api.py	91.86% <66.66%> (-0.29%)	⬇️
...src/filters/components/Range/RangeFilterPlugin.tsx	74.56% <75.47%> (+19.17%)	⬆️
... and 18 more

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[rusackas]

/testenv up

[github-actions]

@rusackas Ephemeral environment spinning up at http://35.161.59.44:8080. Credentials are admin/admin. Please allow several minutes for bootstrapping and startup.

[github-actions]

Ephemeral environment shutdown and build artifacts deleted.