UserAgent: Mozilla/5.0 (Macintosh; Intel Mac OS X 10_11_6) AppleWebKit/537.36 (KHTML, like Gecko) Chrome/54.0.2840.98 Safari/537.36

Steps to reproduce the problem:
I would like to be able to easily test against common screen sizes, like 12" macbook, macbook pro 13, 15. Surface book, etc.

What is the expected behavior?

What went wrong?
Only smartphones and tablets in predefined list of devices in responsive mode.

Did this work before? N/A 

Chrome version: 54.0.2840.98  Channel: n/a
OS Version: OS X 10.11.6
Flash Version: Shockwave Flash 24.0 r0