Track which puzzles we have regression testing for

EduNetworkBuilder/ListBoxWindow.cs

@@ -419,6 +419,7 @@ namespace EduNetworkBuilder
                             MPE.isdone = wasfinished;
                             MPE.level = tag;
                             MPE.InRegressionMode = true;
+                            MPE.HasTest = oursettings.HasReplay(puzzle_name);
                             if (selected == "" && !wasfinished) selected = shown_name; //Select the first unfinished puzzle
                             lbWindowData.Items.Add(MPE);
                             break;