Remove redundant includes, remove references to deprecated
QApplication::GuiServer (passing that has no effect anymore), and use
QStyleFactory instead of referencing QWindowStyle directly (about to
become an internal class).
Change-Id: I08f94993a55ce6039c7694d8f7019cbd53594edc
Reviewed-by: Caroline Chao <caroline.chao@digia.com>
Reviewed-by: J-P Nurmi <jpnurmi@digia.com>