Regression from c57f10b6,
where I disabled the master background in Impress but not in Draw,
and both share some common code.

Besides, disable master background in draw as well. Follow-up of bug
tdf#111306

Change-Id: I772382b5ed8eff3a35d001ea498810613137d172
Reviewed-on: https://gerrit.libreoffice.org/60913
Tested-by: Jenkins
Reviewed-by: Xisco Faulí <xiscofauli@libreoffice.org>