refs https://github.com/TryGhost/Product/issues/3832
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### <samp>🤖 Generated by Copilot at fd2a023</samp>
This pull request improves the UI and UX of the admin settings app by
fixing some bugs, enhancing some components, and adding some logic to
handle different feature states. It affects the `ColorPickerField`,
`Toggle`, `EnableNewsletters`, `TierDetailModal`, `Modal`, and
`DefaultRecipients` components, as well as the files
`ColorPickerField.tsx`, `Toggle.tsx`, `EnableNewsletters.tsx`,
`TierDetailModal.tsx`, `Modal.tsx`, and `DefaultRecipients.tsx`.
bd013ed18c