dashboard.py: add screen to show DUT logs
Add a new screen that shows the logs from a DUT provided by salad. User can exit this screen with Control+C
Fixes: https://gitlab.freedesktop.org/mupuf/valve-infra/-/issues/97
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Add a new screen that shows the logs from a DUT provided by salad. User can exit this screen with Control+C
Fixes: https://gitlab.freedesktop.org/mupuf/valve-infra/-/issues/97