Differentiate background of page for autonomous and driver-controlled period

**Is your feature request related to a problem? Please describe.**
When using a smaller (7") tablet, you have to scroll down to hit the submit button at the end of autonomous. During the heat of entering the scores, you sometimes forget to submit, thus scoring all the cones during driver-controlled on the autonomous screen.

**Describe the solution you'd like**
Suggest making the background of the page for autonomous period be a different color then the background of the page for driver-controlled so you have a better feel of what period your scoring.