PlasmaComponents ScrollBar is broken

[Marco Martin]

On Monday 30 July 2012, Aleix Pol wrote:
> I've been thinking of rewriting the ScrollBar without this RangeModel,
> but maybe that's only because I don't understand it enough. Can
> anybody look into this and give me a hand? I think it would be really
> interesting to sort this one out!
> 
> Aleix

try to update to current master, binding loop warnings are gone.

the test case seems to work fine for me but don't know what was the intended 
behavior, so give it a try ;)

Cheers,
Marco Martin