<Swing Dev> [9] Review request for 7094099: DropDown List of JComboBox detached

[anton nashatyrev]

Hello,
     could you please review the following fix:

fix: http://cr.openjdk.java.net/~anashaty/7094099/9/webrev.00/ 
<http://cr.openjdk.java.net/%7Eanashaty/7094099/9/webrev.00/>
bug: https://bugs.openjdk.java.net/browse/JDK-7094099

This is the open part of the whole fix which adds a hook to the Swing so 
the Applet could track the opening/closing of the Swing popup menus. For 
this the special ChangeListener is passed in the AppContext. If the 
MenuSelectionManager finds it the listener is added.

Thanks!
Anton.