Archived image (rebased onto develop)

This is  (almost) the same as gh-1041 but rebased onto develop
The last commit handles the file imported using FS.

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Review the display of the archived option see https://trac.openmicroscopy.org.uk/ome/ticket/10451

To test log as user-4 howe
 * Import an image (no archived flag for Fs)
 * Check that the archived flag is selected.
 * Check that the download button is not greyed out.