fix: Adds check to print error message if any panel order value is se…

…t to 0.

src/UserInterface/UserInterfaceExtensions/Panels/Panel.cs

@@ -17,9 +17,9 @@ public class Panel : ICiscoCodecUiExtensionsPanel
         internal void OnClickedEvent() { ClickedEvent?.Invoke(this, EventArgs.Empty); }
 
         /// <summary>
-        /// Determines the order of the panels.  Values are 1-9999.  0 is not valid. Lower numbers are displayed first.
-        /// <!-- 1-9999 -->
+        /// Determines the order of the panels.   Lower numbers are displayed first.
         /// </summary>
+        /// <remarks>Valid values are 1-9999.  0 is not valid.</remarks>
         [XmlElement("Order")]
         [JsonProperty("order")]
         public ushort Order { get; set; }

src/UserInterface/UserInterfaceExtensions/Panels/PanelsHandler.cs

@@ -35,6 +35,13 @@ public PanelsHandler(IKeyed parent, Action<string> enqueueCommand, List<Panel> c
                     "No Cisco Panels Configured {0}", _parent, config);
                 return;
             }
+            else if (config.Any((p) => p.Order == 0))
+            {
+                Debug.LogMessage(Serilog.Events.LogEventLevel.Error,
+                "0 is an invalid order value. Must be >= 1 {0}.  PanelHandler will not be registered.  Please update order values in config.", _parent, config);
+                return;
+            }
+
             RegisterFeedback();
         }