Update the connecting screen with a time out error

[jenncross]

Students will sit and watch the loading screen for a long time without connections. Maybe change the connecting screen and create a time out error screen with debugging / troubleshooting steps (restart software, unplug/replug Hummingbird, try different USB port, wait for Windows driver to finish setup, etc.).

[jenncross]

Maybe add in a user required action like, "Try again" or "Retry" or whatever the standard dialog prompt for that sort of thing is. Along with the instructions to: 1) stop programmer, 2) disconnect hummingbird . 3) reconnect hummingbird, 4) start programmer