chore(ui-mode): improve alignment of settings select beside checkboxes

[agg23]

Places select label on a new line from the actual dropdown and aligns it with the checkboxes in other settings.

After

Before

[github-actions]

Test results for "tests 1"

6 flaky

⚠️ [firefox-library] › library/inspector/cli-codegen-1.spec.ts:1079 › cli codegen › should not throw csp directive violation errors `@firefox-ubuntu-22.04-node18`
⚠️ [firefox-page] › page/page-event-request.spec.ts:182 › should return response body when Cross-Origin-Opener-Policy is set `@firefox-ubuntu-22.04-node18`
⚠️ [firefox-page] › page/page-wait-for-function.spec.ts:104 › should work with strict CSP policy `@firefox-ubuntu-22.04-node18`
⚠️ [playwright-test] › ui-mode-test-output.spec.ts:80 › should show console messages for test `@ubuntu-latest-node18-1`
⚠️ [webkit-library] › library/inspector/cli-codegen-aria.spec.ts:76 › should update aria snapshot highlight `@webkit-ubuntu-22.04-node18`
⚠️ [webkit-page] › page/page-set-input-files.spec.ts:38 › should upload a folder `@webkit-ubuntu-22.04-node18`

46814 passed, 821 skipped

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Merge workflow run.