Fix migration alert

There is probably a need to fix PendingMigrationAlert behavior. The alert is shown after an unprepared USB drive plugged in. It can confuse the user.

The migration alert should appear after preparing the device/drive (not during the preparation process).

Edited Apr 13, 2021 by Aleksandr Gumroian

To upload designs, you'll need to enable LFS and have an admin enable hashed storage. More information

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