Autonomous chooser not working when connected to the field

[gerthworm]

Sorry to hear you've been having issues. We had a couple mysterious, non-reproducible issues. We've taken the following mitigation tasks:

1) Poll Smartdashboard (via getSelected()) every half-second during DisabledPeriodic()
2) Write the present auto mode number seen on the robot back to a different indicator on Smartdashboard (which provides feedback that the robot has received changes in mode)
3) Drive team actively selects a new mode every robot boot, and double checks that it's acknowledged. No OK until we confirm correct auto is going to be executed. Restart Smartdashboard or reboot robot if needed.

It's held up well enough for two regional so far....