Terminal is not restored properly from qml & qmlscene tools

On Raspberry Pi (and other EGLFS most likely) the qml & qmlscene tools leave the terminal in an unusable state as code in http://code.qt.io/cgit/qt/qtbase.git/tree/src/platformsupport/fbconvenience/qfbvthandler.cpp is called to disable keyboard and cursor but is not restored properly on exit.

In cases where exit is handled via a signal & proper Qt app termination it works but for example if the qml tool is called without a filename it will use plain exit() to exit so the  QFbVtHandler destructor is never called to restore the tty.

A quick fix locally was to add "delete app" before calling noFilesGiven(); in http://code.qt.io/cgit/qt/qtdeclarative.git/tree/tools/qml/main.cpp#n566