l10n: de.po: translate 210 new messages

Translate 210 new messages came from git.pot update in fda7b09
(l10n: git.pot: v2.11.0 round 1 (209 new, 53 removed)) and c091ffb
(l10n: git.pot: v2.11.0 round 2 (1 new, 1 removed)).

Signed-off-by: Ralf Thielow <[email protected]>

Author: ralfth