webadmin: use new element-id-capable SortedColumn for vm statustext

In the VM main tab, the 'status text' column lost its static element id,
probably when it was made into a SortedColumn or a composite column.
Added infrastructure for a SortedColumnWithElementId and switched the
column to that.

Change-Id: I97bb0a04d46e94efede5f46af35ebcee01a9dd70
Bug-Url: https://bugzilla.redhat.com/1148530
Signed-off-by: Greg Sheremeta <gshereme@redhat.com>