Save hosts immediately after pairing concludes to ensure the server cert is persisted

app/backend/computermanager.h

@@ -166,6 +166,7 @@ class ComputerManager : public QObject
 
     friend class DeferredHostDeletionTask;
     friend class PendingAddTask;
+    friend class PendingPairingTask;
 
 public:
     explicit ComputerManager(QObject *parent = nullptr);