I would like to suggest a small feature that would be extremely useful for photo management: a "Copy" option in the viewer context menu. Currently there's only "Copy to", and the dialog does not remember the previous location. With "Copy", one would be able to paste photos to a file manager. Most of the other viewers, including the default one on Windows, provide this option.
*** This bug has been marked as a duplicate of bug 381898 ***
*** This bug has been marked as a duplicate of bug 290294 ***