ApplicationWindow: added content orientation handling.

On platforms that does not rotate whole screen when
device orientation changes, ApplicationWindow can handle
it by itslef by rotating main part of contentItem.

Change-Id: I32b1611718d290eb49ab774a5c310fb12ebbfd83
Reviewed-by: Tomasz Olszak <olszak.tomasz@gmail.com>
Tizen: Settings.hasTouchScreen returns true on Tizen.

Change-Id: I818bff2fcc416215c07b65e6714fcc995e9d3409
Reviewed-by: Jarosław Staniek <staniek@kde.org>