Unpublishing a users public page will return a 404 error

[jobara]

Prerequisites

• I've searched for existing issues

Describe the bug

When a user is viewing their public page and click the unpublish button, they are returned to the same page but get a 404 error.

To Reproduce

Steps to reproduce the behavior:

1. Go to the dev site
2. Create an individual user with the accessibility consultant role
3. Create a public page and publish it
4. Change the individual user's roles to include community connector
5. View the published public page
6. Click on "Unpublish"
7. Notice the 404 error

Expected behavior

While it's sort of correct to get the 404 error as you're on the now unpublished page, it would probably be better to either redirect to the dashboard or edit view for the public page.

[jobara]

Typically when you unpublish the page it goes to the preview of the page. In this case we get the 404 because the page isn't previewable; it's missing values needed for the community connector role. When the page isn't previewable you get a 404 returned from the individual view policy.