Support HTML target attribute in web map popups

Idea created by gyetman on Mar 30, 2016

    When configuring a web map popup, the interface allows access to the HTML tags. When creating a link from the popup, the default href target is "_blank"; changing the target to "_self" (or any other valid target) is ignored by ArcGIS Online--the resulting web map popup only supports "_blank". 

    It would be great if changes made to the target attribute are respected by ArcGIS Online.