Show Total Score on Referee Tablets

**Is your feature request related to a problem? Please describe.**
The arrangement of referees around the field is confusing for scoring referees (scoring some, but not all, achievements from each alliance). This can result in referees entering scores for the wrong alliance. The only way for referees to figure out they've entered scores for the wrong alliance is to enter scores on the scoring tablet and watch for a corresponding change on the match timer monitor/projector.

**Describe the solution you'd like**
Show alliance scores on the scoring tablet to enable immediate feedback and minimize the amount of time referees have to watch anything but their tablet and the match.

**Describe alternatives you've considered**
Any alternatives would require major UI changes.