fix: hiding HiddenControl inputs for real, so they don't add height

[rusackas]

SUMMARY

There are (or were) some hidden inputs in the Explore control panel, which were taking up about a pixel each vertically, thanks to Bootstrap. This PR simply adds a display:none to the controls that are of type HiddenControl to take them out of the DOM layout. They should still submit properly in all modern-ish browsers.

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Coming soon...

TESTING INSTRUCTIONS

ADDITIONAL INFORMATION

• Has associated issue:
• 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 #15182 (80d0c33) into master (c829614) will increase coverage by 0.00%.
The diff coverage is 100.00%.

@@           Coverage Diff           @@
##           master   #15182   +/-   ##
=======================================
  Coverage   76.94%   76.94%           
=======================================
  Files        1042     1042           
  Lines       56254    56255    +1     
  Branches     7785     7786    +1     
=======================================
+ Hits        43286    43287    +1     
  Misses      12710    12710           
  Partials      258      258           

Flag	Coverage Δ
hive	81.53% <ø> (ø)
javascript	71.02% <100.00%> (+<0.01%)	⬆️
mysql	81.95% <ø> (ø)
postgres	81.96% <ø> (ø)
presto	81.83% <ø> (ø)
python	82.46% <ø> (ø)
sqlite	81.64% <ø> (ø)

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

Impacted Files	Coverage Δ
...set-frontend/src/explore/components/ControlRow.tsx	100.00% <100.00%> (ø)

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[geido]

LGTM!