Fix order

LeCountdown/Views/NewCountdownView.swift

@@ -188,7 +188,8 @@ struct CountdownEditView : View {
         
         cd.duration = self._minutes * 60.0 + self._seconds
         if self._isAdding {
-            cd.order = Int16(self.countdowns.count)
+            let max = self.countdowns.map { $0.order }.max() ?? 0
+            cd.order = max + 1
         }
         if !self.nameString.isEmpty {
             cd.activity = CoreDataRequests.getOrCreateActivity(name: self.nameString)