Create a tails-installer-launcher

Originally created by @Anonymous on #9380 (Redmine)

create a tails-installer-launcher that only proposes these two options:

* add support for “install from ISO”
* make sure “upgrade from ISO” works outside of Tails

Feature Branch: u451f:liveusb-creator/feature/jessie_launcher_2

Edited May 15, 2020 by Anonymous

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