tdf#59323: pptx export: add initial support for lstStyles in textboxes
Adds initial support for writing lstStyles that are specific to a shape.
Current implementation only writes first paragraph and first textruns properties
in it.
Made WriteParagraphProperties return a bool that determines whether or not it
wrote a pPr tag. Needed this since lvl1pPr tag should be started even if there
was no paragraph properties since run properties also written inside it.
Change-Id: Ie0cfc9b9f221093db3a1111ca29140a6dfb5e8ad
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/117011
Tested-by: Jenkins
Reviewed-by: Miklos Vajna <vmiklos@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/117539
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Mike Kaganski <mike.kaganski@collabora.com>