Bug! Stopping system while streaming!

[andrewjaykeller]

To duplicate:
-- START

1. Connect and start streaming from board with GUI
2. Tap 'SYSTEM CONTROL PANEL'
3. Press 'STOP SYSTEM' button
4. Try to connect to the board
   -- END
   You have now left the board in a streaming state, notice that when you try to open the serial connection, the red LED on the dongle lights up because the board is still sending data.

Immediate solutions:

1. Press the RST button on the board

Proposed Solutions:

1. Always send a stop streaming command on startup
2. Wait for 50ms before closing the serial port to allow for the stop streaming command to leave the dongle and reach the board.