Description

When NavigatorButton is added inside ItemGroup, the last item gives double order on focus.

Step-by-step reproduction instructions

• Navigate to typography section in global styles menu
• In Elements item group, change the focus state of last item.
• Observe that there is double border.

Screenshots, screen recording, code snippet

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Environment info

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Please confirm that you have searched existing issues in the repo.

Yes

Please confirm that you have tested with all plugins deactivated except Gutenberg.

Yes