fix: Replace space with tabulator and enter as separators

[kgabryje]

SUMMARY

Disable confirming value with space button and replace it with tabulator and enter buttons - now we can use multi-word values like "Russian Federation".
Closes #12644
Fixes #12644

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

Nagranie.z.ekranu.2021-01-25.o.09.51.49.mov

TEST PLAN

ADDITIONAL INFORMATION

• Has associated issue: [explore] Unable to add space-separated values to filters using IN #12644
• Changes UI
• Requires DB Migration.
• Confirm DB Migration upgrade and downgrade tested.
• Introduces new feature or API
• Removes existing feature or API

CC: @junlincc @zuzana-vej @villebro

[codecov-io]

Codecov Report

Merging #12730 (c50ec27) into master (307e3a9) will decrease coverage by 0.41%.
The diff coverage is n/a.

@@            Coverage Diff             @@
##           master   #12730      +/-   ##
==========================================
- Coverage   66.83%   66.41%   -0.42%     
==========================================
  Files        1022     1022              
  Lines       49992    49992              
  Branches     4892     5023     +131     
==========================================
- Hits        33410    33201     -209     
- Misses      16457    16666     +209     
  Partials      125      125              

Flag	Coverage Δ
cypress	50.91% <ø> (ø)
javascript	60.87% <ø> (ø)
python	63.30% <ø> (-0.70%)	⬇️

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

Impacted Files	Coverage Δ
...Control/AdhocFilterEditPopoverSimpleTabContent.jsx	78.98% <ø> (ø)
superset/sql_validators/postgres.py	50.00% <0.00%> (-50.00%)	⬇️
superset/views/database/views.py	62.69% <0.00%> (-24.88%)	⬇️
superset/databases/commands/create.py	83.67% <0.00%> (-8.17%)	⬇️
superset/databases/commands/update.py	85.71% <0.00%> (-8.17%)	⬇️
superset/sql_validators/base.py	93.33% <0.00%> (-6.67%)	⬇️
superset/db_engine_specs/base.py	79.59% <0.00%> (-6.38%)	⬇️
superset/db_engine_specs/sqlite.py	90.62% <0.00%> (-6.25%)	⬇️
superset/db_engine_specs/presto.py	82.25% <0.00%> (-5.85%)	⬇️
superset/views/database/forms.py	83.33% <0.00%> (-5.56%)	⬇️
... and 12 more

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[junlincc]

LGTM! ✅

Screen.Recording.2021-01-25.at.2.50.49.AM.mov