also exposes the other preferences (default document filter, default
sorting) in a default settings dialog

Change-Id: I7a4080f70f5727bfb2fabe8d8f57cb5b8337481f
Reviewed-on: https://gerrit.libreoffice.org/15638Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Christian Lohmaier <lohmaier+LibreOffice@googlemail.com>