Use RequiresScrollButtons to determine if menu is overflowed

Author: toehead2001

src/System.Windows.Forms/System/Windows/Forms/Controls/ToolStrips/ToolStripDropDownMenu.cs

@@ -848,20 +848,14 @@ protected override void OnMouseWheel(MouseEventArgs e)
     {
         base.OnMouseWheel(e);
 
-        if (e.Delta == 0 || Items.Count == 0)
+        if (e.Delta == 0 || Items.Count == 0 || !RequiresScrollButtons)
         {
             return;
         }
 
         Rectangle firstItemBounds = Items[0].Bounds;
         Rectangle lastItemBounds = Items[Items.Count - 1].Bounds;
 
-        if (firstItemBounds.Top == DisplayRectangle.Top &&
-            lastItemBounds.Bottom == DisplayRectangle.Bottom)
-        {
-            return;
-        }
-
         int delta = firstItemBounds.Height * SystemInformation.MouseWheelScrollLines * -Math.Sign(e.Delta);
 
         if (delta < 0)