MenuAction close no longer created by default

The close action is no longer created by default in MENU dialog.

Before version 2.30, a close MenuAction was created by default for MENU dialogs. This action node is no longer created, except if you have a COMMAND KEY(INTERRUPT) in the MENU, or if you have your own user action handler ON ACTION close, of course. You must take this change into account if you are manipulating the AUI tree with om classes in MENUs.