changing theme does not update the theme in a live running app #1670

1. Open an app in Ensemble go with a couple of screens. Make sure it has a button
2. change the theme to give buttons blue background
3. app will get the new theme but will not update. As you move around in the app, the old theme will remain

changing screen definitions are properly pushed and reflected in the UI. themes are not. I have not yet tried settings, translations, env variables