some messages do not reach the GUI when we call [send_to_gui()](https://github.com/darosior/ledger_installer/blob/45525c812872a2e37157586eb88bdf68bce72a51/gui/src/ledger_service.rs#L350), i guess it's because send_to_gui() is no `async` and is not awaited
some messages do not reach the GUI when we call send_to_gui(), i guess it's because send_to_gui() is no
asyncand is not awaited