Enable downloading original images into specified directory

[dominikl]

The download original image option downloads the files (and directories) of the original file structure into Fileset directories (as they are in the server's managed repository). This makes sure that they can be reimported again. However some users want to download the original image files into a specified directory instead (which might break complex multi-file image formats). That's what Insight used to do in the past. Julio suggested that could be a configurable option, see https://forum.image.sc/t/omero-insight-batch-downloads-into-filesets/87893/8 .

[imagesc-bot]

This issue has been mentioned on Image.sc Forum. There might be relevant details there:

https://forum.image.sc/t/omero-insight-batch-downloads-into-filesets/87893/9