Since 78d1f1c2, we convert floating
tables to text frames only in case it's possible that there will be
wrapping, to give better results for multi-page tables, which are
multi-page, and technically floating ones, but that has no effect on the
layout.

The problem was that we try to do this decision too early, effectively
the page width and margins were counted from the default letter size,
instead of the actual values, which did not arrive at the time of the
decision. Fix this by moving this logic at the section end.

Change-Id: Ic1fbceb54c8ec223ed01836fafe6220bb3b2410a