Listen for events on receiver device on timeout

Previously, if a receiver device didn't respond during the initial scan,
logid would not recognize it until it sent a wakeup/connect event.

This makes it so if the device times out, logid will listen for the next
event from the device and try detecting it. (e.g. shaking the mouse will
make it become detected)

src/logid/backend/dj/ReceiverMonitor.h

@@ -42,6 +42,8 @@ namespace dj
         virtual void addDevice(hidpp::DeviceConnectionEvent event) = 0;
         virtual void removeDevice(hidpp::DeviceIndex index) = 0;
 
+        void waitForDevice(hidpp::DeviceIndex index);
+
         // Internal methods for derived class
         void _pair(uint8_t timeout = 0);
         void _stopPairing();