It is often not obvious whether the currently played 1v1 multiplayer game is rated or not. The objectives dialog should always display that to eliminate any doubt.
Notice that we don't have a nice way to distinguish single- and multiplayergames and replays of lobby and non-lobby multiplayer games.
Hence just always show that setting for 1v1 games in replays and lobby games
(thus hide it in single and non-lobby multiplayer games but still show it in replays of singleplayer 1v1s etc.)
Also it should be the topmost element, because if it can be set, it will be the most important boolean of the match.
Notice the previous 1v1 test was broken, because skirmish maps (can?) add a null gaia PlayerData entry. So while at it, also test for AIs.