Hide "Notification Listener Active" menu if we are using active subscriber instead

Author: tdanner

Src/SwqlStudio/MainForm.Designer.cs

@@ -552,6 +552,10 @@ private void byHierarchyToolStripMenuItem_Click(object sender, EventArgs e)
 
         private void fileToolStripMenuItem_DropDownOpening(object sender, EventArgs e)
         {
+            menuNotificationListenerActive.Visible =
+                separatorAboveNotificationListenerActive.Visible =
+                    !Settings.Default.UseActiveSubscriber;
+
             menuNotificationListenerActive.CheckState = SubscriptionManager.IsListening()
                 ? CheckState.Checked
                 : CheckState.Unchecked;