Add auto scrolling

Assets/Fungus/Scripts/Components/NarrativeLog.cs

@@ -112,7 +112,7 @@ namespace Fungus
         /// <returns></returns>
         public string GetPrettyHistory(bool previousOnly = false)
         {
-            string output = "";
+            string output = "\n ";
             int count;
 
             count = previousOnly ? history.lines.Count - 1: history.lines.Count;

Assets/Fungus/Scripts/Components/NarrativeLogMenu.cs

@@ -131,6 +131,9 @@ namespace Fungus
                 {
                     historyText.text = FungusManager.Instance.NarrativeLog.GetPrettyHistory();
                 }
+                Canvas.ForceUpdateCanvases();
+                narrativeLogView.verticalNormalizedPosition = 0f;
+                Canvas.ForceUpdateCanvases();
             }
         }