redo two typo fixes lost in German update collision

In 037fada40db175e95f44c0cb039474c6dc518963 two typos were fixed which
collided with an update ongoing for German po which was committed in
48388911a734ed9ce10ab05043fadba3eed09a1f, so this commit just merges the
first commit again.

Git-Dch: Ignore