The document had 3 sections, separated by continuous section breaks.
Previously only margins from the last section were imported, this way
the first page had default margins.

Now margins are also applied when we hit continuous section breaks. This
way margin values from the last section break affecting the page wins. A
later commit could improve this further by setting the minimum of these
and setting a section margin for each non-minimal sections.

Change-Id: I4d9a4585e795220533909bd1d467d933caaa0d71