Use range-based loops or replace with comphelper or STL functions

Change-Id: I3d63811caf80c87a9d560087e1f0d933ebcc0d55
Reviewed-on: https://gerrit.libreoffice.org/72040
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>