plasma2 and ToolTipManager

[Marco Martin]

Hi all,
looking at how to port various things, i seen that everything
concerning tooltips is pretty much self contained.
also, all it needs is a pedestrian api porting from QGraphicsWidgets
to whatever new (even just qobject, or qgraphicsobject before,
qquickitem after qml2 porting)

what struck to me as veryeasy to do, is porting this away from
libplasma and making it a component.

the user would create a ToolTip, that is basically a representation of
tooltipdata (what we already do in qml)

but that would in turn create a refcounted singleton as needed that
would be the old tooltipmanager, living in the core plasmaimports
instead of libplasma

comments?

Cheers,
Marco Martin