How can I get 'Editing Layer's Name' in place of 'Untitled feature' as shown in the below images of Esri's ArcGIS API for JS- 'Editor widget - 4.12 ?
Eic,
What you will notice is that there is a difference between the two web map layer that are being edited in those two samples.
widgets-editor-basic:
Display Field: HazardType
widgets-editor-configurable:
https://services.arcgis.com/V6ZHFr6zdgNZuVG0/arcgis/rest/services/Crime_Map_Demo/FeatureServer/0
Display Field:
The display field is what is being shown in the editors header.