I was going to check out what my mobile app looks on tablet so I clicked on the three dots on the top-right corner of the mobile dev envt, next to the Share button.
The three options "App theme", "Mobile app settings" and "Scripts" appear unresponsive. Not sure about "Reset app state" as I don't know if it is supposed to trigger any pop-up or anything.
I am using Edge on Windows 10. Similar observation (or lack thereof) on Chrome. Browsers are up to date. Anyone else seeing this?