Update NumericUpDown Text when losing focus

src/Avalonia.Controls/NumericUpDown/NumericUpDown.cs

@@ -287,6 +287,13 @@ namespace Avalonia.Controls
             ValueProperty.Changed.Subscribe(OnValueChanged);
         }
 
+        /// <inheritdoc />
+        protected override void OnLostFocus(RoutedEventArgs e)
+        {
+            CommitInput();
+            base.OnLostFocus(e);
+        }
+
         /// <inheritdoc />
         protected override void OnTemplateApplied(TemplateAppliedEventArgs e)
         {