Looks like we can't reproduce the issue or there's a problem in the test case provided.
[2.2] [FR] Make icon mixin more generic
The current icon mixin in the base theme in 2.2 takes only 1 argument, the name, and automatically generates icons for .x-tab and .x-button.
The problem is that some themes will have extra components requiring icons as well and that means adding the mixin to the theme and keeping it in sync with base when the sdk is updated.
My suggestion is to add a 2nd argument, the component's class, and to let themes indicate which components require icons.
Olivier - interfaSys
Developing custom solutions for BlackBerry 10 using Sencha Touch.
Thanks for the report! I have opened a feature request in our bug tracker.