https://help.cartinuum.com/space/WC/4340809729/Web+AppBuilder+Migration+Improvements+for+ArcGIS+Online%3A+New+Features+and+Limitations
Web AppBuilder Migration Improvements for ArcGIS Online: New Features and Limitations
arcgis onlinenew featureswebappbuildermigration
https://documentation.basis.cloud/BASISHelp/WebHelp/formbuilder/formbuilder_appbuilder_childwindow_definition_node.htm
FormBuilder/AppBuilder: ChildWindow Definition Node
formbuilderappbuilderdefinitionnode