Aliases in stages do not work if the steps to the referenced stage are added after the alias

[shakty]

Example:

This does not work:

  stager
        .next('instructions')
        .next('quiz')
        .repeat('game', settings.REPEAT)
        .repeat('game AS game2', settings.REPEAT)
        .repeat('game AS game3', settings.REPEAT)
        .next('questionnaire')
        .next('end')
        .gameover();

    stager.extendStage('game', {
        steps: ['bid', 'results']
    });

This works:

  stager
        .next('instructions')
        .next('quiz')
        .repeat('game', settings.REPEAT)

    
    stager.extendStage('game', {
        steps: ['bid', 'results']
    });
    
    stager.repeat('game AS game2', settings.REPEAT)
        .repeat('game AS game3', settings.REPEAT)
        .next('questionnaire')
        .next('end')
        .gameover();

When it does not work, node.game.plot.getStep fails because inside the sequence the aliasing stage has empty steps array.

[shakty]

TODO: update doc when fixed