Tidy some things up, refactor dialing/ringing behaviors

src/room/InCallView.tsx

@@ -321,7 +321,7 @@ export const InCallView: FC<InCallViewProps> = ({
   const showFooter = useBehavior(vm.showFooter$);
   const earpieceMode = useBehavior(vm.earpieceMode$);
   const audioOutputSwitcher = useBehavior(vm.audioOutputSwitcher$);
-  useSubscription(vm.autoLeaveWhenOthersLeft$, onLeave);
+  useSubscription(vm.autoLeave$, onLeave);
 
   // Ideally we could detect taps by listening for click events and checking
   // that the pointerType of the event is "touch", but this isn't yet supported