Add Edit/Close dialogs for MG and CM. Ensure that trade file is reloaded after edit.

ViewModels/CMTTrendViewModel.cs

@@ -1118,6 +1118,7 @@ namespace TradeBlotter.ViewModels
       String strMessage=String.Format("Edited Position for {0} Purchase Date:{1} Purchase Price:{2}, Trailing Stop:{3}. A backup was created.",
       selectedPosition.Symbol,selectedPosition.PurchaseDate.ToShortDateString(),Utility.FormatCurrency(selectedPosition.PurchasePrice),Utility.FormatCurrency(selectedPosition.TrailingStopLimit));
       MessageBox.Show(strMessage,"Edit Position");
+      LoadSessionFile();
     }
 
     public void AddToWatchListCommand(String symbol)