Review for gerrit 98187 : tdf#100348 add fill to fontwork in export to pptx

[Regina Henschel]

Hi all,

I have continued to work on Fontwork. It brings fill, outline and 
effects from LO to pptx. The patch is in
https://gerrit.libreoffice.org/c/core/+/98187

It has the following limitations:
Not for docx
No import
Has no solution for character properties like "bold", which are ignored 
in LibreOffice but evaluated in PowerPoint.

I know, that unit tests are missing.

Please have a look, whether you see any problems. Otherwise I would 
commit it to master.

Kind regards
Regina