update localized strings file

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14046 f4695dd4-2c0a-0410-b89c-da849a56a58e
update German localization for 2.8

git-svn-id: svn://svn.transmissionbt.com/Transmission/trunk@14047 f4695dd4-2c0a-0410-b89c-da849a56a58e