refactor: rearrange and add solution for 4-series

src/PepperDash.Essentials/Room/Config/EssentialsHuddleVtc1PropertiesConfig.cs

@@ -0,0 +1,19 @@
+extern alias Full;
+
+using System;
+using System.Collections.Generic;
+using System.Linq;
+using System.Text;
+using Crestron.SimplSharp;
+using Full.Newtonsoft.Json;
+
+namespace PepperDash.Essentials.Room.Config
+{
+
+    public class EssentialsHuddleVtc1PropertiesConfig : EssentialsConferenceRoomPropertiesConfig
+    {
+		[JsonProperty("defaultDisplayKey")]
+		public string DefaultDisplayKey { get; set; }
+
+    }
+}