When a PtContainer widget full of other widgets is realized on top of a "running" PtTrend, the overlapping portion of 
the container scrolls in the trend as if it were part of the data.  Eventually the overlapping portion of the container 
"scrolls off" the trend, and what is left looks like the container was realized under the trend.

That was not the behavior I was expecting, and it is not the behavior I get when I use a dialog box instead of a 
container widget.

Is there a way to keep the container "intact" AND on top of the trend?