Avoid freezing placeholder notification text (#6843)

src/main/csharp/net/eagle0/clients/unity/eagle0/Assets/Eagle/NotificationPanel.cs

@@ -95,7 +95,8 @@ namespace eagle {
                 }
 
                 var existingNote = _notes.FirstOrDefault(
-                        n => n.Title == notification.Title &&
+                        n => n.Title == notification.Title && !n.IsTextDynamic &&
+                             !notification.IsTextDynamic &&
                              HeroListsMatch(n.DisplayedHeroes, notification.DisplayedHeroes));
 
                 if (existingNote == null) {

src/main/csharp/net/eagle0/clients/unity/eagle0/Assets/Eagle/Notifications/DynamicTextNotification.cs

@@ -6,6 +6,8 @@ namespace eagle.Notifications {
     using ProvinceId = Int32;
 
     public class DynamicTextNotification : Notification, IDisposable {
+        public override bool IsTextDynamic => true;
+
         private List<GeneratedTextListener> textListeners = new();
         private string textTemplate;
         private Dictionary<string, string> placeholderValues = new();

src/main/csharp/net/eagle0/clients/unity/eagle0/Assets/Eagle/Notifications/Notification.cs

@@ -19,6 +19,8 @@ namespace eagle.Notifications {
         public List<HeroView> DisplayedHeroes { get; }
         public string BeastVisualName { get; }
 
+        public virtual bool IsTextDynamic => false;
+
         private static List<HeroView> ListFromHeroViews(
                 HeroView firstHero = null,
                 HeroView secondHero = null,