Fix download of archived image (see #9850)

[jburel]

Fix critical bug https://trac.openmicroscopy.org.uk/ome/ticket/9850

To test:

• select an image with name like /usr/foo.dv
• Make sure the default directory is displayed and not /usr
• Check that the image can be downloaded
• Test with an archived image and an image not archived.

[ximenesuk]

Looks good. Ready to merge.

[gusferguson]

Tested using:
http://hudson.openmicroscopy.org.uk/job/OMERO-merge-4.4/54/artifact/src/target/
gretzky
Mac 10.6

Imported 4 files - 2 images - .psd and .dv version of each

Note:

1. check box to archive on import no longer in import dialogue - therefore expected it to be done automatically
2. Despite the "Options" tab options being set at default which is: Overide default naming and instead use ... partial with 0 directories before - the files were imported with full path back to "/Users/rkferguson/"

When images imported they were all named with their original file extensions.
On downloading - images were downloaded as .ome.tif (only 1 f)
On exporting they were downloaded as .ome.tiff (2 fs)

So it appears that either archiving is not taking place, and unlike the old version it is allowing downloading even if there is no archived version, or downloading is just using export.

All / directories are stripped from the names for both "download" and export.

Behaviour the same on Windows 7

[jburel]

@gusferguson; Archived is gone with FS. and the links between pixels and files are not done yet. So it is normal to have an OME-TIFF. It works as expected

[jburel]

@gusferguson: Comment should be added to #469. @ximenesuk tested it and it works fine.