Can we reference external canvases in Manifest's items?

[azaroth42]

eg

{
"type": "Manifest",
"items":
  [
   {"id": "somewhere/else/canvas/26",
   "type": "Canvas",
   "partOf": {
       "id": "somewhere/else/manifest/1",
       "type": "Manifest"
    }
  }
 ]
}

Then we can not do it in Ranges, and the range refers to the local reference in items, closing #2300

[azaroth42]

No. We get the functionality via ranges which is already a step up in complexity from the simplest single canvas manifest. Simple things simple, allow ramping up, complex thing is possible in Ranges.

Closing won't fix.