[Security Solution] Exceptions Flyout follow-up

[dplumlee]

Summary

Fixes a few lingering bugs and UX issues from the previous exceptions flyout PR. Also widens the field column in the exceptions builder to better utilize and fit the increased space a flyout provides.

Specifically addresses:
#124287

Screenshots

Over timeline

Small Screen layout

Large Screen layout

Checklist

Delete any items that are not applicable to this PR.

• Documentation was added for features that require explanation or tutorials
• Unit or functional tests were updated or added to match the most common scenarios
• This renders correctly on smaller devices using a responsive layout. (You can test this in your browser)

For maintainers

• This was checked for breaking API changes and was labeled appropriately

[elasticmachine]

Pinging @elastic/security-detections-response (Team:Detections and Resp)

[dplumlee]

@elasticmachine merge upstream

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: 61e2096
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• Webpack Bundle Analyzer

Metrics [docs]

Async chunks

Total size of all lazy-loaded chunks that will be downloaded as the user navigates the app

id	before	after	diff
lists	140.7KB	140.7KB	-6.0B
securitySolution	4.7MB	4.7MB	+49.0B
total			+43.0B

History

• 💚 Build #24422 succeeded 7188e70
• 💚 Build #23001 succeeded 4ba9b6f552eaa0395b7b645c6643d0dc6da96f15

To update your PR or re-run it, just comment with:
@elasticmachine merge upstream

cc @dplumlee

[yctercero]

LGTM - pulled down and played around with it. Adding from alerts table, from timeline.

Thanks for the fix!

[kibanamachine]

💚 All backports created successfully

Status	Branch	Result
✅	8.1

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