Network returns all the rectangle shapes on the map. For use on the net-test editor

EduNetworkBuilder/Network.cs

@@ -1167,6 +1167,20 @@ namespace EduNetworkBuilder
             }
             return Descriptions;
         }
+        /// <summary>
+        /// This is used by the NetTest editor to list all the shape names we can lock a device into
+        /// </summary>
+        /// <returns>A list of the names of all the rectangles</returns>
+        public List<string> RectangleNames()
+        {
+            List<string> Descriptions = new List<string>();
+            foreach (NetShape NS in Shapes)
+            {
+                if(NS.MyShape == NetShapeType.rectangle)
+                    Descriptions.Add(NS.Name);
+            }
+            return Descriptions;
+        }
 
         void KillAllExtraWindows(bool EvenRTF=false)
         {