Shows working copy options for Plone Site

[wesleybl]

This PR should be tested together with the following PRs:

plone/plone.restapi#1823
plone/plone.app.iterate#128
plone/Products.CMFEditions#113

To test, you need to create a new Plone Site, install plone.app.iterate, and change the hasWorkingCopySupport setting to true.

• I signed and returned the Plone Contributor Agreement, and received and accepted an invitation to join a team in the Plone GitHub organization.
• I verified there aren't other open pull requests for the same change.
• I followed the guidelines in Contributing to Volto.
• I succesfully ran code linting checks on my changes locally.
• I succesfully ran unit tests on my changes locally.
• I succesfully ran acceptance tests on my changes locally.
• If needed, I added new tests for my changes.
• If needed, I added documentation for my changes, either in the Storybook or narrative documentation.
• I included a change log entry in my commits.

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Closes #5284

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