Fix time grain after revert

[betodealmeida]

SUMMARY

Fix time grain, after PR reverting some casing changes (snake/camel case).

TEST PLAN

Filter box now works as expected.

ADDITIONAL INFORMATION

[ ] Has associated issue:
[ ] Changes UI
[ ] Requires DB Migration. Confirm DB Migration upgrade and downgrade tested.
[ ] Introduces new feature or API
[ ] Removes existing feature or API
[x] Fixes bug
[ ] Refactors code
[ ] Adds test(s)

REVIEWERS

@xtinec @khtruong @datability-io @DiggidyDave

[datability-io]

👍

[codecov-io]

Codecov Report

Merging #7228 into lyftga will not change coverage.
The diff coverage is 100%.

@@           Coverage Diff           @@
##           lyftga    #7228   +/-   ##
=======================================
  Coverage   64.49%   64.49%           
=======================================
  Files         425      425           
  Lines       20879    20879           
  Branches     2280     2280           
=======================================
  Hits        13466    13466           
  Misses       7287     7287           
  Partials      126      126

Impacted Files	Coverage Δ
superset/assets/src/explore/controls.jsx	42.4% <100%> (ø)	⬆️

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