when I click the button, the grid grows larger than the
component and a scrollbar appears at component level: that is, it
scrolls the title, the grid and the button.
I would like to force the scrollbar to appear inside gridBox,
so that only the grid is affected when scrolling.
How is it possible?
I did not explain myself clearly: I want to let the grid
grow, and pan over it through its direct container scrollbars.
Still, your hint was winning: I set the *container*'s width
to a "fixed" (bound) value and it did it.