webadmin: mismatch in dialog header

edit CPU QoS dialog.

Change-Id: I04da25eda198e2e4e59e51ce854dddf9a4ddaef4
Bug-Url: https://bugzilla.redhat.com/1142336
Signed-off-by: Gilad Chaplik <gchaplik@redhat.com>
(cherry picked from commit 87469bf7cd814b8bfcee350880eaf59ac33c0da1)