If a whiteboard's only location is as a view on a list, right-clicking the view and selecting "Delete" sends the entire whiteboard to Trash. There's no warning, no distinction between "remove from this location" vs "permanently delete." Users should be able to remove a whiteboard from a Views Bar without destroying the underlying file, the same way removing a task from a list doesn't delete the task. A simple solution to this might be to make it possible to move it back to the Whiteboard Hub as its home. As of now the Whiteboard hub is not an option when moving them.