fix: Cascading filter popover widens automatically

[michael-s-molina]

SUMMARY

Fixes #15354

@rusackas @villebro

BEFORE/AFTER SCREENSHOTS OR ANIMATED GIF

TESTING INSTRUCTIONS

Check the original issue for 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 #15390 (f4875d1) into master (95b9e2e) will increase coverage by 0.36%.
The diff coverage is 43.43%.

❗ Current head f4875d1 differs from pull request most recent head 8d922c4. Consider uploading reports for the commit 8d922c4 to get more accurate results

@@            Coverage Diff             @@
##           master   #15390      +/-   ##
==========================================
+ Coverage   76.78%   77.15%   +0.36%     
==========================================
  Files         975      975              
  Lines       50550    50650     +100     
  Branches     6204     6223      +19     
==========================================
+ Hits        38817    39080     +263     
+ Misses      11526    11359     -167     
- Partials      207      211       +4     

Flag	Coverage Δ
javascript	71.73% <36.62%> (-0.08%)	⬇️

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

Impacted Files	Coverage Δ
...rset-frontend/src/components/ImportModal/index.tsx	69.89% <ø> (+0.10%)	⬆️
superset-frontend/src/components/Select/Select.tsx	0.00% <0.00%> (ø)
...src/dashboard/components/DashboardBuilder/utils.ts	84.61% <0.00%> (+6.04%)	⬆️
...src/dashboard/components/PropertiesModal/index.jsx	85.61% <ø> (ø)
...src/dashboard/components/gridComponents/Column.jsx	87.87% <ø> (ø)
...nd/src/dashboard/components/gridComponents/Row.jsx	86.66% <ø> (ø)
...ers/components/TimeGrain/TimeGrainFilterPlugin.tsx	0.00% <0.00%> (ø)
.../FilterBar/CascadeFilters/CascadePopover/index.tsx	62.31% <33.33%> (+0.55%)	⬆️
...d/src/explore/components/DatasourcePanel/index.tsx	81.33% <57.14%> (-9.74%)	⬇️
superset/app.py	68.42% <63.41%> (-14.92%)	⬇️
... and 53 more

---

Continue to review full report at Codecov.

Legend - Click here to learn more
Δ = absolute <relative> (impact), ø = not affected, ? = missing data
Powered by Codecov. Last update 95b9e2e...8d922c4. Read the comment docs.

[villebro]

Thanks for the fix! One comment about the added caret. Also, we should probably have a quick discussion about whether or not we want to remove the indentation. I understand that the original design removes valuable horizontal real estate that can cause trouble if there are deeply nested filter, but it would be good to hear other people's thoughts on how to best relay information about the cascading hierarchy.

[villebro]

LGTM 👍 Let's try to squeeze in an engineering+design session at some point to refine the cascading functionality (deep nesting vs current shallow nesting) + design (popover, indentation etc)