I don't understand the point of the radio power button on my 12" UC. In our BMW, the radio power button is basically a mute button (or play/pause button when CarPlay is connected). In UConnect, it seems to both mute/pause the audio as well as turn the entire screen off. This makes no sense, especially in the 12" model when so much non-media stuff is controlled by the screen. Is there another mute/pause option that I am missing?