sc: filter: rtf: add method "WriteFontTable"
Write the font table while visiting column/row and
get the unique index to reference it.
"The \fonttbl control word introduces the font table group.
Unique \fN control words define each font available in the document,
and are used to reference that font throughout the document."
Signed-off-by: Henry Castro <hcastro@collabora.com>
Change-Id: I20c5d1128972f5ec9b9b2e246f466bdb173ef8a4
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/154906
Tested-by: Jenkins CollaboraOffice <jenkinscollaboraoffice@gmail.com>
Reviewed-by: Caolán McNamara <caolan.mcnamara@collabora.com>
Reviewed-on: https://gerrit.libreoffice.org/c/core/+/155261
(cherry picked from commit
2d5732b254134da7942687ea3b1bb04859cc9c34)