The old getDelta() returns everything for an "App Folder", meaning the app folder and all its subfolders.
It appears that the new listFolder/Continue() isn't really equivalent in that way. It seems to list the files and if you want subfolders you need to make another listFolder call to delve deeper. I can figure out if those paths are absolute or relative, but I'm unclear on how to handle the cursors for the subfolders. Can I just keep track of the app folder one, or do I need to track subfolder cursors as well?