UI does not correctly display multiplayer battles

[Benezivas]

When running a battle with the --ui option that runs between at least two teams, the ui only renders one pairing.

Example:

battle testsproblem --generators=testsproblem/generator,testsproblem/generator --solvers=testsproblem/solver,testsproblem/solver --team_names=foo,bar --ui

Output:

Battle Type: Iterated Battle
╔═════════╦═════════╦══════╦══════╦══════╦══════╦══════╦══════╦══════╗
║   GEN   ║   SOL   ║  R1  ║  R2  ║  R3  ║  R4  ║  R5  ║  CAP ║  AVG ║
╟─────────╫─────────╫──────╫──────╫──────╫──────╫──────╫──────╫──────╢
║      bar║      foo║     5║     5║     5║     5║     5║     5║     5║
╚═════════╩═════════╩══════╩══════╩══════╩══════╩══════╩══════╩══════╝

The logs state that all battles actually run (in this case, the battle in which foo generators and bar solves). This seems to be an issue with the ui rendering only.