http://zkfiddle.org/sample/82r1vn/1-action-is-not-working-properly-in-vlayout

The zul.box.Layout implements its own "removeChildHTML_" , but not taking care the actions_ at all ,
so the below two button click have different behavior.

Not sure it's a spec or a bug.

==
<zk>

<button label="click me , it's slideup correctly" action="hide: slideUp" onClick="self.detach();" ></button>

<vlayout>
<button label="click me , it's not slideup correctly" action="hide: slideUp" onClick="self.detach();" ></button>
</vlayout>
</zk>

===