The Geoportal Server 1.2.7 "What's New" documentation describes the "Geoportal Search" and "AddToMap" widgets, and says to copy them to \\WebAppBuilderForArcGIS\client\stemapp\widgets folder. Where do I get them from in order to copy them there?
Look here:
geoportal-server-catalog/geoportal/src/main/webapp/viewer/widgets at master · Esri/geoportal-server-...