Fixed ScrollArea not updating ScrollContext on content resize.

Author: Hermanest

src/reactive-sdk/Reactive.Components/Components/ScrollArea/ScrollArea.cs

@@ -64,6 +64,7 @@ public ScrollOrientation ScrollOrientation {
 
         #region Setup
 
+        private float _prevContentSize;
         private float _lastScrollDeltaTime;
 
         protected override void OnUpdate() {
@@ -73,6 +74,15 @@ protected override void OnUpdate() {
                 _lastScrollDeltaTime = -1f;
             }
 
+            if (_contentTransform != null) {
+                var contentSize = Translate(_contentTransform.rect);
+                
+                if (_prevContentSize != contentSize) {
+                    RefreshMeasurements();
+                    _prevContentSize = contentSize;
+                }
+            }
+
             UpdateContentPos(false);
         }
 
@@ -131,7 +141,7 @@ private void UpdateContentPos(bool immediately) {
             }
 
             var translatedDestinationPos = Translate(destinationPos);
-            
+
             // Returning if equal
             if (sourcePos == destinationPos) {
                 _posSet = true;