Looks like we can't reproduce the issue or there's a problem in the test case provided.
seems you can't remove a Navigation Bar once set true
when adding a config object for Ext.navigation.View in ST2.2, it seems there is no way to go back and set that to a boolean and make it false.
Originally Posted by pkellner
Thanks for the post Peter. If you delete it you can change it back to a boolean. Outside of that I am not sure there is a more elegant way.
Sencha Architect Development Team