Force new portrait in Show to undimmed

Close #922

Assets/Fungus/Docs/CHANGELOG.txt

@@ -10,6 +10,7 @@ Unreleased
  - SetNextLineFlag only flags if Dialog is actually active/writing. Thanks to breadnone. 
  - TextAdapter with TMPro, now forces mesh update on text change. Fixes cases where a Say/Writer would expect RevealedCharacters to be current but would be previous frame stale value.
  - Camera Fade clears local callback before execution, fixes #973.
+ - Force portraits undimmed on change sprite.
 
 ## Changed
  - Block will LogError when an exception is caught from a Command being Executed.

Assets/Fungus/Scripts/Components/PortraitController.cs

@@ -438,7 +438,17 @@ namespace Fungus
 
             options.character.State.SetPortraitImageBySprite(options.portrait);
             options.character.State.portraitImage.rectTransform.gameObject.SetActive(true);
-            LeanTween.alpha(options.character.State.portraitImage.rectTransform, 1f, duration).setEase(stage.FadeEaseType).setRecursive(false);
+            
+            if(options.character.State.portraitImage.color != Color.white)
+            {
+                LeanTween.color(options.character.State.portraitImage.rectTransform, Color.white, duration)
+                    .setEase(stage.FadeEaseType)
+                    .setRecursive(false);
+            }
+
+            LeanTween.alpha(options.character.State.portraitImage.rectTransform, 1f, duration)
+                .setEase(stage.FadeEaseType)
+                .setRecursive(false);
 
             DoMoveTween(options);