Restore the post type's view_item label for preview links that don't submit the changes.

fixes #28350.
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4.0-RC2.

Built from https://develop.svn.wordpress.org/trunk@29696


git-svn-id: http://core.svn.wordpress.org/trunk@29471 1a063a9b-81f0-0310-95a4-ce76da25c4cd