Meaningfull download filename ( config option ? ) instead of Document ID.

[kisst]

Is your feature request related to a problem? Please describe.
When I download files, for example when I have to e-mail them out, then the downloaded files will have a file name of the document ID, rather then the original filename, or some other metadata or combination of metadata fields, which makes it hard to identify which download is which.

Describe the solution you'd like
Either set the download filename to something fixed but meaningful like the original filename, or just matching the web interface, the combination of date and original filename, or create a settings for it where the filename can be assembled.

Describe alternatives you've considered
No technical alternative right now, the only way is to open each downloaded file with ID like names and try to see what is what.

Additional context
N/A