Fix module name format in displayed code

Follow the conventions at
http://qt-project.org/wiki/Spelling_Module_Names_in_Qt_Documentation

QtDBus       -> Qt D-Bus
QtMultimedia -> Qt Multimedia
QtWidgets    -> Qt Widgets

Change-Id: I96a1523b37e294b10b203782074943c6ec55e34a
Reviewed-by: Thiago Macieira <thiago.macieira@intel.com>