remove menu extra on demand

pEpNotifications/pEpNotifications/AppDelegate.swift

@@ -94,6 +94,9 @@ class AppDelegate: NSObject, NSApplicationDelegate, NSUserNotificationCenterDele
         if sender.state == NSControl.StateValue.on {
             sender.state = NSControl.StateValue.off
             UserDefaults.standard.set(false, forKey: "AlwaysShowThisMenu")
+            if statusText.representedObject == nil {
+                uninstallMenuExtra()
+            }
         }
         else {
             sender.state = NSControl.StateValue.on