Fix Tails Cloner: Reset start button, link and labels when last drive removes (#20069)
requested to merge BenWestgate/tails:remove_last_drive_resets_to_the_Install_condition_#20069 into stable
Currently, if the last target USB stick is a Tails USB and it is removed leaving none the start button continues saying "Upgrade" as well as the link being "Manual Upgrade Instructions".
This MR stops on_target_partitions_changed() from returning early in the Device is None case.
When there are no devices and this method is called, it will reset the interface to the more appropriate Install/Backup condition.
Closes #20069 (closed).
Edited by Ben Westgate