Fix groups layout is not rebuilt on value change for serialized types

Author: vanifatovvlad

Editor/Elements/TriPropertyCollectionBaseElement.cs

@@ -12,6 +12,11 @@ public abstract class TriPropertyCollectionBaseElement : TriElement
 
         private Dictionary<string, TriPropertyCollectionBaseElement> _groups;
 
+        internal void ClearGroups()
+        {
+            _declarations.Clear();
+        }
+
         [PublicAPI]
         public void DeclareGroups([CanBeNull] Type type)
         {

Editor/Elements/TriReferenceElement.cs

@@ -28,8 +28,6 @@ public TriReferenceElement(TriProperty property, Props props = default)
             _props = props;
             _showReferencePicker = !property.TryGetAttribute(out HideReferencePickerAttribute _);
             _skipReferencePickerExtraLine = !_showReferencePicker && _props.inline;
-
-            DeclareGroups(property.ValueType);
         }
 
         public override bool Update()
@@ -132,6 +130,9 @@ private bool GenerateChildren()
 
             RemoveAllChildren();
 
+            ClearGroups();
+            DeclareGroups(_property.ValueType);
+
             foreach (var childProperty in _property.ChildrenProperties)
             {
                 AddProperty(childProperty);