优化更新代码，添加界面功能并整合

WPFluent/Controls/TreeModelListView/TreeModelRowCollection{T}.cs

@@ -0,0 +1,45 @@
+using System.Collections.Generic;
+using System.Collections.ObjectModel;
+using System.Collections.Specialized;
+using System.ComponentModel;
+
+namespace WPFluent.Controls;
+
+public class TreeModelRowCollection<T> : ObservableCollection<T>
+{
+    public void RemoveRange(int index, int count)
+    {
+        CheckReentrancy();
+        if (Items is List<T> { } items)
+        {
+            items.RemoveRange(index, count);
+        }
+        OnReset();
+    }
+
+    public void InsertRange(int index, IEnumerable<T> collection)
+    {
+        CheckReentrancy();
+        if (Items is List<T> { } items)
+        {
+            items.InsertRange(index, collection);
+        }
+        OnReset();
+    }
+
+    /// <summary>
+    /// <see cref="ObservableCollection{T}.CountString"/>
+    /// <see cref="ObservableCollection{T}.IndexerName"/>
+    /// </summary>
+    private void OnReset()
+    {
+        OnPropertyChanged(nameof(Count));
+        OnPropertyChanged("Item[]");
+        OnCollectionChanged(new NotifyCollectionChangedEventArgs(NotifyCollectionChangedAction.Reset));
+    }
+
+    private void OnPropertyChanged(string propertyName)
+    {
+        OnPropertyChanged(new PropertyChangedEventArgs(propertyName));
+    }
+}