webadmin: Fix Fencing Policy look

Fixes the look of Fencing Policy tab in Cluster detail popup.

Change-Id: Ie1c4cb496bf3a324ecd311a03a090945c679060d
Bug-Url: https://bugzilla.redhat.com/1120829
Bug-Url: https://bugzilla.redhat.com/1090799
Bug-Url: https://bugzilla.redhat.com/1120858
Signed-off-by: Martin Perina <mperina@redhat.com>