userportal,webadmin: drag windows

- Due to some layout changes the 'Caption' of the windows
  was now below some transparent layer and was not receiving
  events anymore. I move the 'Caption' layer to the top and
  everything is working again.

Change-Id: Iee527761196d9a43a3eef003f60e2063e04d9d9c
Bug-Url: https://bugzilla.redhat.com/show_bug.cgi?id=1139634
Signed-off-by: Alexander Wels <awels@redhat.com>