not randomly scattered through the code

found with something like:
   git ls-files *.cpp | xargs grep -Pzl "(?s){.*#include"

Change-Id: I9c242fa4ef99e8677f2800d7ec9f16d16e488351
Reviewed-on: https://gerrit.libreoffice.org/30952Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>