I have setup a onlinetest server where the developers are using it to test their web pages. I want to add throttle override settings differently for Mobile and Desktop based on which choice they make in the UI. Not sure how and where to do this.

If I add the settings in server.yaml like this, the choice does not differentiate between whether Mobile or Desktop was chosen in the run and seems to use the same for both runs.

`# If you don't setup a default sitespeed.io configuration, you can add

your sitespeed.io configuration directly in this block

sitespeed.io:
"browsertime.viewPort": "1920x1080"
"videoParams.filmstripFullSize": "true"
"browsertime.connectivity.up": "4000"
"browsertime.connectivity.down": "9000"
"browsertime.connectivity.rtt": "75"
"browsertime.connectivity.engine": "throttle"
"browsertime.connectivity.profile": "custom"`

Im sure Im missing something simple, please provide a lead on how to accomplish different overrides for Mobile and Desktop. Even better if the override shows up as the only option in the Menu !