no need to store a ref-counted thing like OUString on the heap, just put
it directly inside a std::vector.
And no need to store a dynamic container like std::list on the heap
either, just put it directly inside a std::vector.

Change-Id: If14a620916caab543d799ca868ee94129a51c672
Reviewed-on: https://gerrit.libreoffice.org/59224
Tested-by: Jenkins
Reviewed-by: Noel Grandin <noel.grandin@collabora.co.uk>