Folder Context Menus - When copying folder, hippo:availability property is missing in the target copied live variant node.

Reproduction path

• Run the demo
• Copy a news folder to somewhere
• Open a news document in the copied folder
• The publish button is unavailable until it's edited manually.

The root cause:

• When copying, the document must be unpublished in destination, which means the live variant node must have empty array value in hippo:availability property.
• However, the initial demo content does not have preview variant node. As a result, the CMS UI wasn't able to determine if the document is publishable or not.

Solution

• Simply add preview variant nodes in the demo project in the source documents.