Fix error showing up when opening a document from a Collection

Steps to reproduce:

• Create a workspace.
• Inside it, create a file.
• Go back to the workspace and create a collection.
• Add the file to the collection.
• Open the collection and open the file. For a brief moment an error message will be shown stating "The user aborted a request. Could not load the document". When the file is accessed directly from the workspace the problem is not reproducible.

(could not reproduce on 10.10)