Download original file



Modify download on dev_4_4 before applying changes on develop see https://trac.openmicroscopy.org.uk/ome/ticket/8188

Test 1:
 * Import an image, select archive at import
 * Select the Download option on the right-hand side ![DownloadMenu](https://f.cloud.github.com/assets/1022396/141022/2d1e6788-7237-11e2-8ef7-4ab27c84826a.png)
 * Download the image

Test 2:
 * Import an image composed of several files, select archive at import
 * Select the Download option on the right-hand side
 * Download the image

Test 3:
 * Import an image, DO NOT select archive at import
 * Select the Download option on the right-hand side
 * Download the image. No result returned, A message indicating to download as OME-TIFF should be displayed