Sencha Touch Ext.List disappearing behind a wrapped toolbar

I have written an MVC Sencha Touch app to query a database via JSON an开发者_如何学运维d then return the list in an Ext.List

The idea here is to have an iPhone-style UINavigationController effect that slides in for the results list.

To achieve this I use an Ext.Panel that loads 2 cards, one is my query (Ext.Form) the other is the results wrapper Ext.Panel (I use the wrapper to display a toolbar at the top since Ext.List is not capable of this)

I use the forms filter to trigger a 'search" method in the wrapper that then loads an instance of my Ext.List.

This all works quite well, except the results list fills the whole screen, and therefore sits "behind" the wrappers toolbar instead of below it. The results don't even display at all unless the Ext.List has fullscreen:true.

Any suggestions most welcome.