Akt -> Current in Excel filter (namebuff)

Change-Id: Idf36f8e19bb96b1d71edb49138c0ab36856c73ce
Reviewed-on: https://gerrit.libreoffice.org/49192Tested-by: Jenkins <ci@libreoffice.org>
Reviewed-by: Markus Mohrhard <markus.mohrhard@googlemail.com>