Make QtQuick QML wizards more consistent

With this patch there is a Qt Quick 2.4 and a Qt Quick Controls 1.3 wizard
that both use .ui.qml files, but only the wizard for controls actually
uses controls. Using .ui.qml files is now the default for the latest versions.

Change-Id: I0d6c4d6878c0052330387339562831af37aa482b
Reviewed-by: Alessandro Portale <alessandro.portale@digia.com>