Manifest with thumbnail property

This is a manifest where there is a thumbnail property on the manifest.

Links:

• https://iiif-commons.github.io/fixtures/examples/thumbnail/manifest/v2/thumb_prop/manifest.json
• UV 3
• UV 4
• Mirador
• Clover
• Thumbnail Panel

In this example the Manifest has a thumbnail property with dimensions. It happens to be the same thumbnail as the first page.