D8CORE-8671: Fix to overflow of option in filtered list.

[jenbreese]

READY FOR REVIEW

Summary

• Removed the overflow unset because options were flowing on top of each other.
• Added 6px of top-padding to make space for the shadow which is why the overflow was unset.

Review By (Date)

• Soon

Criticality

• High

Urgency

• High

Review Tasks

Setup tasks and/or behavior to test

1. Check out this branch
2. Rebuild Cache and import config drush cr ; drush ci
3. Create many filtered options
4. Create a filtered list
5. Navigate to page and see the options are not overriding
6. Verify when the radio button is pressed and the shadow appears it is not cut off.

Site Configuration Sync

• Is there a config:export in this PR that changes the config sync directory?

Front End Validation

• Design is approved by @ user?
• HTML validation: Is the markup using the appropriate semantic tags and passes validation? Or, QA request ticket created?
• Cross-browser testing: Has been performed? Or, QA request ticket created?
• Automated accessibility: Scans performed? Or, QA request ticket created?
• Manual accessibility: Manually tested? Or, QA request ticket created?

Backend / Functional Validation

Code

• Are the naming conventions following our standards?
• Does the code have sufficient inline comments?
• Is there anything in this code that would be hidden or hard to discover through the UI?
• Are there any code smells?
• Are tests provided? eg (unit, behat, or codeception)

Code security

• Are all forms properly sanitized?
• Any obvious security flaws or new areas for attack?

General

• Is there anything included in this PR that is not related to the problem it is trying to solve?
• Is the approach to the problem appropriate?

Affected Projects or Products

• Does this PR impact any particular projects, products, or modules?

Associated Issues and/or People

- D8CORE-8671

Resources

• AMP Tool
• Accessibility Manual Test Script
• HTML Validator
• Browserstack and link to Browserstack Credentials