Added and Started on views for Chart Viewer

Models/ChartModel.cs

@@ -67,11 +67,12 @@ namespace EFB.Models
                 //make Charts request
                 var requestCharts = await API.Post<ChartResponse>($"https://chartfox.org/api/charts/grouped/{ICAO}", headerData, body);
                 Console.WriteLine("End");
-                return requestCharts.Result.Response;   
-            }else
-            {
-                return null;
+                if (requestCharts.Result.Status == "success")
+                {
+                    return requestCharts.Result.Response;   
+                }
             }
+            return null;
         }
     }