l10n: de.po: translate 210 new messages

Translate 210 new messages came from git.pot update in fda7b092
(l10n: git.pot: v2.11.0 round 1 (209 new, 53 removed)) and c091ffbe
(l10n: git.pot: v2.11.0 round 2 (1 new, 1 removed)).
Signed-off-by: NRalf Thielow <ralf.thielow@gmail.com>