removing residual higlights in case the menu item was not handled at all (eg missing about handler)

git-svn-id: https://svn.wxwidgets.org/svn/wx/wxWidgets/branches/WX_2_8_BRANCH@46181 c3d73ce0-8a6f-49c7-b76d-6d57e0e08775

src/mac/carbon/toplevel.cpp

@@ -566,6 +566,7 @@ pascal OSStatus wxMacTopLevelMouseEventHandler( EventHandlerCallRef handler , Ev
         if ( cEvent.GetKind() == kEventMouseDown )
         {
             ::MenuSelect( screenMouseLocation ) ;
+            ::HiliteMenu(0);
             result = noErr ;
         }
     }