Track if the action collection needs to be saved.

EduNetworkBuilder/ActionClass.cs

@@ -12,6 +12,11 @@ namespace EduNetworkBuilder
         Network StartingState = null;
         public List<NetworkAction> NetActions = new List<NetworkAction>();
         NetworkAction CurrentNetAction = null;
+        bool _HasUnsavedChanges = false;
+        public bool HasUnsavedChanges {
+            get { return _HasUnsavedChanges; }
+            private set { _HasUnsavedChanges = value; }
+        }
 
         public Network GetNet { get { return StartingState; } }
         public int GetActionCount {  get { if (CurrentNetAction == null) return 0; return CurrentNetAction.Actions.Count; } }
@@ -68,6 +73,8 @@ namespace EduNetworkBuilder
             //Add this one
             CurrentNetAction.HasBeenStored = true; //Note that we have stored it
             NetActions.Add(CurrentNetAction);
+            //Note that the long-term action list has some new actions which have not been saved
+            HasUnsavedChanges = true;
         }
 
         /// <summary>