l10n: de.po: switch from pure German to German+English (part 1)

This switches the translation from pure German to German+English.

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
l10n: de.po: switch from pure German to German+English (part 2)

This switches the translation from pure German to German+English.

Signed-off-by: Ralf Thielow <ralf.thielow@gmail.com>
l10n: de.po: switch from pure German to German+English (part 3)

This switches the translation from pure German to German+English.

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