Fixes #3964. Null Reference in DoDrawBorderAndPadding

Author: BDisp

Terminal.Gui/Views/Menu/Menu.cs

@@ -494,7 +494,7 @@ private void AddKeyBindingsHotKey (MenuBarItem? menuBarItem)
 
     private void Application_RootMouseEvent (object? sender, MouseEventArgs a)
     {
-        if (a.View is { } and (MenuBar or not Menu))
+        if (!_host._handled && !_host.HandleGrabView (a, this))
         {
             return;
         }

Terminal.Gui/Views/Menu/MenuBar.cs

@@ -1578,11 +1578,16 @@ internal bool HandleGrabView (MouseEventArgs me, View current)
                      && me.Flags != MouseFlags.ReportMousePosition
                      && me.Flags != 0)
             {
-                Application.UngrabMouse ();
+                var parent = me.View is Adornment adornment ? adornment.Parent : me.View;
 
-                if (IsMenuOpen)
+                if (GetTopSuperView () == parent?.GetTopSuperView ())
                 {
-                    CloseAllMenus ();
+                    Application.UngrabMouse ();
+
+                    if (IsMenuOpen)
+                    {
+                        CloseAllMenus ();
+                    }
                 }
 
                 _handled = false;