Bugfix/fix example project fetching older messages (#136)

* Fix excessive TryLoadPreviousMessagesAsync calling - ScrollRect after finished scrolling can have like 1.00005  so we need to add threshold when detecting user scrolling

* cleanup

Author: sierpinskid

Assets/Plugins/StreamChat/Core/State/Caches/CacheRepository.cs

@@ -117,6 +117,5 @@ internal CacheRepository(ConstructorHandler constructor, ICache cache)
 
         private readonly ConstructorHandler _constructor;
         private readonly ICache _cache;
-        private readonly IStatefulModelsFactory _statefulModelsFactory;
     }
 }

Assets/Plugins/StreamChat/Core/State/StatefulModelsFactory.cs

@@ -38,6 +38,6 @@ public StreamUser CreateStreamUser(string uniqueId)
         private readonly ILogs _logs;
         private readonly StreamChatClient _streamChatClient;
         private readonly IStatefulModelContext _context;
-        private readonly Cache _cache;
+        private readonly ICache _cache;
     }
 }

Assets/Plugins/StreamChat/Core/State/StreamStatefulModelBase.cs

@@ -36,6 +36,7 @@ internal StreamStatefulModelBase(string uniqueId, ICacheRepository<TStatefulMode
             Repository.Track(Self);
         }
 
+        //StreamTodo: wrap completely the _additionalProperties in StreamCustomData and not operate on both
         protected Dictionary<string, object> GetInternalAdditionalPropertiesDictionary() => _additionalProperties; 
 
         protected abstract string InternalUniqueId { get; set; }

Assets/Plugins/StreamChat/SampleProject/Scripts/Views/MessageListView.cs

@@ -42,7 +42,8 @@ protected override void OnUpdate()
                 return;
             }
 
-            if (_scrollRect.verticalNormalizedPosition >= 1f && !IsScrollListRebuilding)
+            // Check against 1f + threshold because idle ScrollRect after scrolling can have fractional values above 1f
+            if (_scrollRect.verticalNormalizedPosition >= 1.05f && !IsScrollListRebuilding)
             {
                 TryLoadPreviousMessagesAsync().LogIfFailed();
             }
@@ -283,9 +284,8 @@ private void HideContextMenuIfTouchedOutside()
                 return;
             }
 
-            if (Input.touchCount == 0)
+            if (Input.touchCount == 0 || _activePopup == null)
             {
-                
                 return;
             }