ImageMapster breaks when an image is centered

[t3dotgg]

See title. Possibly relevant: https://stackoverflow.com/questions/13895912/how-to-center-a-dynamically-resizeable-image-map-with-the-imagemapster-plug-in

[t3dotgg]

Should probably be handled when scaling is handled, see https://www.experts-exchange.com/questions/28352073/jQuery-Mapster-Resize-How-to-always-fill-document-body-vertical-center.html