Brief Summary
Pressing ⌘R with the Responsive Design Mode active refreshes the entire system. It would be good if instead ⌘R performed the same action as clicking the refresh button within the responsive design mode system.
Details:
There is an existing feature request for a native responsive design mode, however since that is a big undertaking and will no doubt take longer as a short-term, (relatively) low-effort measure mapping ⌘R within the responsive design mode to the system's internal refresh feature would be a huge quality of life improvement and help tide us over until a native solution can be implemented.
Image/Video:
The refresh button within the responsive design mode: