Archived image

Review the display of the archived option see https://trac.openmicroscopy.org.uk/ome/ticket/10451

To test log as user-4 howe
* Expand elwood test import as > pyramid
* Select one of the "pyramid" image. Check that 
   * the archived item is not selected
   * The download menu item is greyed out
![archived1](https://f.cloud.github.com/assets/1022396/383238/cb61fc08-a611-11e2-8cc8-786d3ab7aa20.png)

* Select the ome.tiff image. Check that 
   * the archived item is selected
   * The download menu item is available
![archived2](https://f.cloud.github.com/assets/1022396/383244/e8084d8a-a611-11e2-9b76-e442e1c336d3.png)