move static arrays to anonymous namespace
try creating the SotAction arrays at compile time with constexpr

Change-Id: If0d0563b35936574beea617da08880a6c32569d9
Reviewed-on: https://gerrit.libreoffice.org/33750Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>