Fix storage save issue.

DelayedSaveStorage/DelayedSaveStorage/DelayedSaveStorage.swift

@@ -75,6 +75,7 @@ public class DelayedSaveStorage: Storage {
                     self?.latestKnownAppData = nil
                 }
             }
+            self?.saveQueue.addOperation(saveOperation)
         }
         saveDelayQueue.addOperation(saveWithDelayOperation)
     }
@@ -106,5 +107,6 @@ public class DelayedSaveStorage: Storage {
             self?.latestKnownAppDataSynchronizationQueue.waitUntilAllOperationsAreFinished()
         }
         self.saveQueue.waitUntilAllOperationsAreFinished()
+        self.latestKnownAppDataSynchronizationQueue.waitUntilAllOperationsAreFinished()
     }
 }