Fix id of Items, saving

CHDataManagement/Views/Files/AddFileView.swift

@@ -78,6 +78,10 @@ struct AddFileView: View {
     }
 
     private func importSelectedFiles() {
+        guard !filesToAdd.isEmpty else {
+            dismiss()
+            return
+        }
         for file in filesToAdd {
             guard file.isSelected else {
                 print("Skipping unselected file \(file.uniqueId)")