Change the title of the QDoc manual offline style header.
Change the title of the QDoc manual offline style header.

Change-Id: I19c88a08794ecd7a7ebdfe5e71eeebd0ee57f37e
Reviewed-on: http://codereview.qt-project.org/6416
Sanity-Review: Qt Sanity Bot <5581206bb7e0307f0d99eb71898ae6b694149ca5@ovi.com>
Reviewed-by: Jerome Pasion <c10995d24f6b454503389e8d00d837aef038985d@nokia.com>
Sanity-Review: Jerome Pasion <c10995d24f6b454503389e8d00d837aef038985d@nokia.com>

kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc,kobolabs/qtdoc