Add option to enable full service menu on LG CS3VA

Author: WildFireFlum

ColorControl/Services/LG/LgPanel.cs

@@ -847,7 +847,7 @@ private void mnuLgExpert_Opening(object sender, CancelEventArgs e)
             mnuLgOLEDMotionPro.Visible = visible;
             miLgEnableMotionPro.Visible = enableVisible;
 
-            var svcMenuFlagVisible = new[] { "A2", "B2", "C2", "G2", "A3", "B3", "C3", "G3" }.Any(m => device?.ModelName?.Contains(m) == true);
+            var svcMenuFlagVisible = new[] { "A2", "B2", "C2", "G2", "A3", "B3", "C3", "G3", "CS3" }.Any(m => device?.ModelName?.Contains(m) == true);
 
             mnuLgSetSvcMenuFlag.Visible = svcMenuFlagVisible;