This is a workaround to create correct SwPageFrm objects for
layouting, so the page break is actually visible when
copying nodes, so we create the correct SwPageFrm.

This is especially problematic for mail merge after the fix in
commit 60d34e1c, which -
correctly - checks all later SwPageDesc for every fix done by
CheckPageDescs().

Change-Id: Ie6ea2e9a0587199be4dbaf3ed63a94c29b318ce2