Elimination group transition bug fix

Fix bug where a team in transition to quarters/semis/finals from a previous group (e.g. they just advanced to semis by winning their second/third match, but don't know their opponents for semis yet) would have their summary display "Playing in finals". 

Since we do the alliance checking at the beginning, if a match group is empty and the previous group has been checked without hitting the eliminated status, then I think it's safe to say they are/will be playing in the next group.