This is some test of widgets added during page loading rather than on page load. The two scrollbars are added
with position absolute ( normal addChild), while the third one is added using addInflowChild() and thus follows
the page content flow.
End of page. wow
Note: some problems while sliding the knob in the inline scrollbar, but must be something about the event coordinate
calculation. Mozilla resizes the table cell while dragging the knob. Oh my. Anyway.