Tails 4: Dragging a file from Nautilus to Gnome desktop no longer works

When demoing SecureDrop, one step of the process caught us by surprise: It is no longer possible to drag files from a mounted USB drive in Nautilus to the desktop. This is arbitrarily dissimilar from every other OS journalists use, and it would be ideal to bring that functionality back.

Related issues

Related to #17207 (closed)
Related to #17195

Original created by @huertanix on 17210 (Redmine)

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