Add some error handling to the QWindowContainer example.

Use a QMainWindow and display errors occurring during loading
QML as well as scene graph errors (for example, failure
to create an Open GL context) in the status bar.

Change-Id: Id9cf190e8a4f40de0f18ab081e2747135221bb88
Reviewed-by: Laszlo Agocs <laszlo.agocs@digia.com>
Fix MSVC2012 compiler warnings.

Tested on both win32 and win64.

Change-Id: I47755e2da51829e61e1452eaaf84a057224b478b
Reviewed-by: Simon Hausmann <simon.hausmann@digia.com>
Reviewed-by: Gunnar Sletta <gunnar.sletta@jollamobile.com>
Fix qquickfolderlistmodel test compilation on WinRT

Like WinCE, the changeDrive() test should be disabled on WinRT.

Change-Id: I85749b84fef372e166fe52c263225478094ccdb4
Reviewed-by: Friedemann Kleint <Friedemann.Kleint@digia.com>
Reviewed-by: Joerg Bornemann <joerg.bornemann@digia.com>