Use correct ratio (portrait) for event posters, update docs.
Created by: NotSpecial
We specified the aspect ratio as height:width, but validate it width:height, which I now corrected.
While at it, I improved the respective docs a little.
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Created by: NotSpecial
We specified the aspect ratio as height:width, but validate it width:height, which I now corrected.
While at it, I improved the respective docs a little.