Enable some cursor keys for binary editor again.

Change-Id: I0e0136a205fa6ca6ed9c8d0d745803488337dd37
Reviewed-on: http://codereview.qt.nokia.com/2626


Reviewed-by: Qt Sanity Bot <qt_sanity_bot@ovi.com>
Reviewed-by: Leandro T. C. Melo <leandro.melo@nokia.com>
Reviewed-by: Eike Ziller <eike.ziller@nokia.com>