Returns the prefix used to name new documents (in English = "Untitled "). Improves the portability of scripts by making them more language-agnostic. Available for Basic and Python scripts. The user documentation should be updated. Change-Id: Ie3c06e25fdc30fc1c3c775ef6ebbcee1d9cd77cd Reviewed-on: https://gerrit.libreoffice.org/c/core/+/183134 Reviewed-by: Jean-Pierre Ledure <jp@ledure.be> Tested-by: Jenkins