Is the QML realtime preview away?

Hello, after upgrading to QtCreator 2.8.1 32bit and Qt 5.1.1 on Linux Mint 32bit I’m missing the QML realtime preview. This made it possible to change QML code in the QtCreator while debugging the application and the application was updated without a restart. I can’t find an option to activate this feature. Does somebody know how to do that? Or is the feature away? Thanks