Set the data label separator to "new line" if there is not
present explicit point separator and the "percentage format
wins over number value format". In MS-Office (2007/2010/2013/2016)
the defult separator is the "new line" in that case, any other
case the separator is a semicolon.
(cherry picked from commit de73efb9)
(cherry picked from commit 42fd10b0)

Change-Id: I9ee0fb9f98fc1bb322892616af50954f4f8db0f9
Reviewed-on: https://gerrit.libreoffice.org/67758
Tested-by: Jenkins
Reviewed-by: Bartosz Kosiorek <gang65@poczta.onet.pl>