MDC-104 branded icon: _BackdropTitle never set up

[keyranova]

There is no _BackdropTitle mentioned in the tutorial, so the app is broken before the recap

[willlarche]

Thanks for reporting that! Yesterday we pushed some changes to this and indeed the definition for that class got left out.

I've pushed out a new version of the text that includes that class. Let me know if that's not working still or clear enough!