Window manager

The window manager provides a nitpicker session interface. In contrast
to the nitpicker server, which leaves the view layout up to the client,
the window manager organizes the views on screen according to a policy
provided by a window layouter. Furthermore, it equips views with window
decorations as provided by a window decorator. Both layouter and
decorator are independent programs.
Adapt qpluginwidget to nitpicker change (WiP)

Right now, it compiles but it does not work.
qt_desktop.diff