[v2] Automatically center window vertically when playing on landscape

[torranx]

PLEASE REFER HERE FOR UPDATED DESCRIPTION

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This PR includes changes from 851

Only added the check if window width < 1920 - this should prevent applying the align-items: center property when the game window is scaled up.

There is another cleaner approach to achieving this through phaser but this would require a reload. If forcing a reload is okay, then that approach is better, otherwise this is.

• width < 1920

• width >= 1920