Make "Upgrade Later" the default option in the first popup of Tails Upgrader
Cf. emails:
- Bug report: 76aa88d80defec7ac9ce950b3e2a491c, people on flaky connections getting the popup over and over again
- Bug report: 35e1b5581ff84afc10883586d2db928e
Alternatively, using a notification instead of a pop-up that steals focus would address these problems.
Edited by intrigeri