"None" option in Prototype Device model dropdown

I like selecting a Device size from the Prototyping dropdown menu (ie: select “MacBook Pro” instead of having to type in 1728x1117), but in my work, I rarely actually want to display the frame of the device. I would like to see a new “None” option in the Model dropdown (where for the MBP I see “Silver” and “Space Gray”) so that I can select not to display the frame of the model.

This will allow me to benefit from selecting a device and its measures, but not be forced to display it in my prototypes.