Team up...with yourself!

Since the UI redesign the team up allows you to use a team up member that's also on the active team.

Steps to reproduce:
1. Make sure Polaris is not an active member of the team.
2. Go to the team up menu and select Polaris.
3. Select Polaris for the active team.

Expected Results: Polaris team up is replaced or removed.
Actual Results: Polaris is an active member of the team and also available for use as a team up.