[SecuritySolution] Inspect modal styling

[angorayc]

Summary

Original issue: #145800
Previous fix: #146015
Previous fix missed to update the styles for x-pack/plugins/timelines/public/components/inspect/modal.tsx, so some of the inspect modal did not apply the same styling.

Steps to verify:

• Please check the inspect panels for hosts page - events table, users page - events table and alerts page - alerts table. Please check the modals' hight and width are the same as rest of the inspect modals on the page.

[kibana-ci]

💚 Build Succeeded

• Buildkite Build
• Commit: a761f88

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
timelines	74.8KB	74.8KB	+52.0B

Unknown metric groups

ESLint disabled in files

id	before	after	diff
osquery	1	2	+1

ESLint disabled line counts

id	before	after	diff
enterpriseSearch	19	21	+2
fleet	59	65	+6
osquery	109	115	+6
securitySolution	443	449	+6
total			+20

Total ESLint disabled count

id	before	after	diff
enterpriseSearch	20	22	+2
fleet	68	74	+6
osquery	110	117	+7
securitySolution	520	526	+6
total			+21

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

cc @angorayc