Sort help registrations.

Looks cleaner, also helps cleanup.

Change-Id: If3182f974ca3401cd44fb062d695685e5029aa81
Reviewed-on: http://codereview.qt-project.org/4473


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>