l10n: de.po: translate 2 new messages

Signed-off-by: Phillip Sz <phillip.szelat@gmail.com>
Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
l10n: de.po: translate 2 messages

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>