fix: Autocomplete prefix icons not showing when component disabled and missing visual focus for AccordionItem header

[aurorascharff]

Describe your changes

Fixed a couple of CSS bugs:

• Prefix icon not showing when disabled for Autocomplete and MultiAutocomplete
• No visual focus for AccordionItem header

Checklist before requesting a review

• I have performed a self-review and test of my code
• I have added label to the PR (major, minor or patch)
• If new component: Is story for component created in stories-folder?
• If new component: Is tsx-file import added to packages/react/index.tsx?
• If new component: Is css-file added to packages/css/index.css?

[github-actions]

Please set a versioning label of either major, minor, or patch to the pull request.