Per-File User Permissions

[YelehaUwU]

I was wondering, if it could be possible, to add an option to subuser's file permissions, that would allow us to select individual folders/files that user would have the permission to read, update.. etc. and unselect those files and folders, that we do not want the user to have access to.

I think many would welcome feature like this inside the panel and would open us more opportunities.

(reopened after a closing, original post here: #2757)