provide correct (stored) content-type for download view response, not generic application/octet-stream
provide correct (stored) content-type for download view response, not generic application/octet-stream

this fixes image/svg+xml rendering on the display view of such an item!

bepasty/bepasty-server,bepasty/bepasty-server,makefu/bepasty-server,makefu/bepasty-server,bepasty/bepasty-server,bepasty/bepasty-server,makefu/bepasty-server