I have a lot of photos in my Dropbox, both edited and raw/unedited files. It would be great with the possibility to hide certain folders from the Photos tab so that e.g. all of the unedited raw files doesn't show up in between the final versions. Also, this would allow hiding folders with other image files that you don't want in your photo collection.
This could either be some right-click folder property, or it could be done by adding e.g. a .dropboxhidephotos file to the folder.