(uart, debug) add UART debug panel with connection information

application.h

@@ -13,6 +13,9 @@ http://mozilla.org/MPL/2.0/.
 #include "PyInt.h"
 #include "network/manager.h"
 #include "headtrack.h"
+#ifdef WITH_UART
+#include "uart.h"
+#endif
 
 class eu07_application {
     const int MAX_NETWORK_PER_FRAME = 1000;
@@ -91,6 +94,9 @@ public:
         is_server() const;
     bool
         is_client() const;
+#ifdef WITH_UART
+    UartStatus uart_status;
+#endif
 
 private:
 // types