Replace old iw4x code in _menus to better detect if players are allowed to change teams and pick classes based on gamemodes.
Back port changes from IW5 to _playerlogic to support new _menus changes.
Fix for ERROR: G_GetPlayerViewOrigin(): Couldn't find "tag_player" on player's view-link parent.
Problem is that the helicopter gets deleted, but the final killcam tries to use it.
Credit goes to @ineedbots