make sure devices are fetched when starting the app with argument '-a'

src/cli/mod.rs

@@ -57,6 +57,7 @@ pub fn handle_cli_args() -> Task<Message> {
     let mut boot_task_chain = window::get_latest().map(Message::StartApp);
     if let Some(adapter) = args.adapter {
         boot_task_chain = boot_task_chain
+            .chain(Task::done(Message::FetchDevices))
             .chain(Task::done(Message::DeviceSelection(adapter)))
             .chain(Task::done(Message::Start));
     }