First, SttDoc() / EndDoc() is the implementation of Ctrl-Home, i.e. it
goes to the start of the current text (like a fly frame), not to the
start of the whole document. When wrapping around, we want the later.

Second, if the normal search have two passes, first searching in the
body text, then searching in the special sections, then the wrap-around
search should do the same.

Change-Id: I0b7466c80476f6fb45174be19215a5d68374d047
(cherry picked from commit c88802829832a315550cb7e19e17030dc4c2bd77)