userportal: NPE in new VM dialog

The new VM dialog used the SpiceFileTransferToggleSupported and
SpiceCopyPasteToggleSupported, but they were not marked as user queries
causing NPE.

Fixed by marking them as user queries.

Change-Id: Ib943ec7e761f837d4f4cd60c277ef9e811300010
Signed-off-by: Frantisek Kobzik <fkobzik@redhat.com>