...changed from old-style with a39c96af
"fdo#46808, Convert sheet::GlobalSheetSettings service to new style."  The
XPropertySet can be treated as an implementation detail (but kept in the
implementation for backwards compatibility).  Also, this should arguably be a
singleton rather than a service, like some related services (e.g.,
com.sun.star.sheet.RecentFunctions), too.

Change-Id: Ibfe3254188aff91a08b39cbc295fb610ae0dfa5f