Avoid including the folder name in filenames when saving OPDS files

[SamKook]

An option to control how files downloaded from an OPDS feed are saved by default would be great.

As it is now, it creates a folder and then it also adds that folder string at the beginning of the filename, followed by " - ", which is potentially problematic for very long filenames since it would either fail or crop data and is very much redundant in my case so I would like to avoid it if possible.

I'm assuming this is the reader behavior since it does the same thing from 2 different OPDS servers I tested that act differently in how their feed are created.