[MERGE] Unclickable z-indexed items in dialogs. (Patching jQuery UI dialog)

The jQuery UI team will not fix the bug because they redisigned
their dialog's code base for their future version (1.10)

http://bugs.jqueryui.com/ticket/5466#comment:8

bzr revid: fme@openerp.com-20121206133126-zc64pkhoh4s89q32

addons/web/static/lib/jquery.ui/js/jquery-ui-1.9.1.custom.js

@@ -8952,7 +8952,7 @@ $.extend( $.ui.dialog.overlay, {
 					$( document ).bind( $.ui.dialog.overlay.events, function( event ) {
 						// stop events if the z-index of the target is < the z-index of the overlay
 						// we cannot return true when we don't want to cancel the event (#3523)
-						if ( $( event.target ).zIndex() < $.ui.dialog.overlay.maxZ ) {
+						if ( $(event.target).closest('.ui-dialog').zIndex() < $.ui.dialog.overlay.maxZ ) {
 							return false;
 						}
 					});