I've tried to create Ext.window.MessageBox and specify "items" via config passed in, and it seems that it doesn't get used. Same result when I tried "dockedItems".
When I looked at the source for MessageBox, it looked like both of these properties were overridden there, so it wouldn't matter what was passed in. Curious if I'm misunderstanding.
The docs at http://docs.sencha.com/ext-js/4-1/#!...dow.MessageBox seem to show these both as valid properties, and I've used these properties for other Panels and Windows, but not for MessageBoxes.
I'm using version 4.1.3.