Sencha: Manipulating Objects
From wiki.jacobjohns.com

- To manipulate any object in Sencha the object must have an
itemId. Select the object and search the 'Filter Configs...' for itemId, and enter a matching Id name for the object. - In the event where we are manipulating our object use the below to make changes to the object.
this.queryById("<itemID>").hide();
