Installer lists devices after they have been unplugged

This is essentially the reverse of #8353 (closed). Steps to reproduce:
1. Start Tails Installer with a USB device plugged either before or after; the important part is that it is listed as a “Target device”.
2. Unplug the device.
3. Notice how the device remains in the “Target device” list, and how the “USB drive found” status is not changed.

Feature Branch: bugfix/8691-and-6538

Related issues

Related to #9131 (closed)

Original created by @anonym on 8691 (Redmine)

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