Submission field for anonymised manuscripts

[mauromsl]

Is your feature request related to a problem? Please describe.
When doing blind peer-reviews, editors have to download a copy of the manuscript, remove any text that might reveal the author's identity and upload the file back. Some presses would prefer to have an additional field where the author can upload a file that had been previously anonymised by them. Editors should still double check and confirm that the contents are not revealing the author's identity.

Describe the solution you'd like
As an author, when submitting a text to a section flagged as peer-revewed, I would like to have a submission field where I can upload an anonymised version of the text.
As an editor, when creating a peer-review assignment, I want to be able to double check the file has been anonymised properly, as well as be able to upload a revision if not.