Refactor constants and functionality name

Added signalR override management
Fix head configuration

Step.Config/ServerConfigController.cs

@@ -7,7 +7,7 @@ using System.Linq;
 using System.Xml.Linq;
 using System.Xml.Schema;
 using static Step.Config.ServerConfig;
-using static Step.Utils.Constants;
+using static Step.Model.Constants;
 
 namespace Step.Config
 {
@@ -130,6 +130,7 @@ namespace Step.Config
                     return ScadaConfig.Enabled;
 
                 case AREAS.GENERAL_KEY:
+                case AREAS.UNDER_HOOD:
                     return true;
 
                 default: