V2 manifests generated via NQ are incorrectly indented

[griffri]

thumbnail objects within V2 manifests that were generated via a named query aren't being correctly indented. Example:

...
            },
            {
              "label": "Roles",
              "value": ""
            }
          ],
          "thumbnail": {
  "@id": "..../thumbs/1/15/image-example/full/198,200/0/default.jpg",
  "@type": "dctypes:Image",
  "service": {
    "@context": "http://iiif.io/api/image/2/context.json",
    "@id": ".../1/15/image-example",
    "profile": "http://iiif.io/api/image/2/level0.json",
    "sizes": [
      {
        "width": 1009,
        "height": 1024
      },
      {
        "width": 395,
        "height": 400
      },
      {
        "width": 198,
        "height": 200
      },
      {
        "width": 99,
        "height": 100
      }
    ]
  }
},
          "height": 4096,
          "width": 4034,
          "images": [
            {
              "@id": ".../1/15/image-example/canvas/c/1/imageanno/0",
              "@type": "oa:Annotation",
...

[donaldgray]

May require fix in https://github.com/digirati-co-uk/iiif-net. Also affects single-item manifests.