Hide the "suspended" menu entry if service not running

Fixes #55

ATxTray/AutoTxTray.cs

@@ -455,7 +455,7 @@ namespace ATxTray
                 _miSvcRunning.Text = @"Service running.";
                 _miSvcRunning.BackColor = Color.LightGreen;
                 _miTitle.BackColor = Color.LightGreen;
-                _miSvcSuspended.Enabled = true;
+                _miSvcSuspended.Visible = true;
                 /*
                 _notifyIcon.ShowBalloonTip(500, AppTitle,
                     "Service running.", ToolTipIcon.Info);
@@ -464,7 +464,7 @@ namespace ATxTray
                 _miSvcRunning.Text = @"Service NOT RUNNING!";
                 _miSvcRunning.BackColor = Color.LightCoral;
                 _miTitle.BackColor = Color.LightCoral;
-                _miSvcSuspended.Enabled = false;
+                _miSvcSuspended.Visible = false;
                 /*
                 _notifyIcon.ShowBalloonTip(500, AppTitle,
                     "Service stopped.", ToolTipIcon.Error);