Option to wrap basemap in the settings dialog

[sverkerEsriSE]

This is more of an enhancement request, but one of our customers have a problem with this app, when a point is very close to the "edge" of the basemap.

In that case, a grey area will be visible between the basemap and the image, see attached picture.

I have seen the option in javascript to let the basemap wrap at the edges, but this is not on by default in ArcGIS Online, or in the releases here at github, so that option being configurable via UI would be appreciated.