[Tails-l10n] (review)[de] 2.4 installation assistant

Hi,
the next branch based upon testing. Please review:

https://gitlab.com/spriver/tails.git
Branch: de_install
HEAD commit: c19cd2d Unfuzzied and translated new strings
Affected files:
wiki/src/install/expert/usb.de.po
wiki/src/install/inc/steps/install_tails_installer.inline.de.po
wiki/src/install/inc/steps/not_at_all.inline.de.po
wiki/src/install/inc/steps/restart_first_time.inline.de.po


Cheers!
spriver