Better status polling

[Murkrow02]

The client pings the matrix every x seconds to know if is online and to update current playing widet.

This can slow down the widget on the matrix by calling when there's no need and could be improved by only use polling when BLE is not available.

When BLE is available the device should update its status only when disconnected from BLE and also retrieve the current playing widget when a BLE notification is sent