Ability for external users to upload files to a specific project folder

[#1]

When a request is sent to an external user to 'request a document', they received an email for the request and they can upload a document. Our user community would like to have the ability to upload the document to a specific folder, rather than the current behavior where it goes to the top level project folder.

A good solution would be to add the option to request a document at the folder level, that way the uploaded file would go to the folder requested by the requester.

[#2]

This always annoyed me that it didn't work that way. Also I wish everyone that can see the project can see that a document request was made. Often times a PM will reach out and ask but the Worker has no idea