Current dev version.

In the entry editor when I right click on a linked PDF I can move (and rename) the file. But I would also like to have the option to "copy" the file instead of moving.

Because:
Sometimes I work with network drive (e.g. ownCloud, ...) related to a whole team. I add literatur (PDF) from there to my bib file. And I want to have my own copy of the PDF because my buddies move and edit the PDF on the network drive.