If the Boot2Qt plugin is installed, the wizard generates the required
code to instantiate the virtual keyboard and to slide it in & out.

Change-Id: I700a00d60de2936972713bf383570629c8bf678f
Reviewed-by: Mitch Curtis <mitch.curtis@qt.io>
Reviewed-by: Rainer Keller <Rainer.Keller@qt.io>