Better stacktrace readability

[JohannesDeml]

When taking a look at the stacktrace of a dispatched signal, Only the base Signal Name appears in the trace, but not derived class. The derived class would be a lot more interesting, since it hold more precise information.

[JohannesDeml]

It is possible to add an override for invoke to make the derived class visible in the stack trace

protected override void Invoke(int index)
{
	base.Invoke(index);
}