refs https://github.com/TryGhost/Product/issues/3832
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### <samp>🤖 Generated by Copilot at 7eda74c</samp>
This pull request improves the validation, customization, and feedback
of various form components and modals in the admin-x-settings app. It
also adds new components for user detail modal sections and modifies the
user type to allow null values for social accounts. Additionally, it
adds `dirty` props to some integration modals and a `data-testid`
attribute to the exit settings button. It also deletes an unused file.
no issue
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### <samp>🤖 Generated by Copilot at 7ab405d</samp>
This change adds a new file `portal.test.ts` that contains acceptance
tests for the Portal Settings feature in the admin-x-settings app. The
tests use Playwright to verify that the portal settings can be
customized and saved correctly. The change aims to improve the test
coverage and confidence for the new feature.
refs. https://github.com/TryGhost/Product/issues/3949
- added `isSearchable` to Select component (default `false`) so that only specific selects are searchable
- added `onFocus` and `onBlur` to select so that it can search for "/" and doesn't jump to the searchfield
