Please take a look at the attached screenshot.
The code looks like this:
There are two problems:
1) The text field width is not 50% of the field set width. Why not? After all, I included columnWidth:0.5.
2) Why are the borders of the inner form panel still shown? I mean seriously, I used all border-related properties and gave them values that should get rid of them.
P.S. I have spent the last 3 hours on this...