I am using the Web App Builder for our GIS portal and need a search widget. There are several posts related to eSearch widget but I was not able to find it in WAB. I understand that it is a custom widget so how can I add it to my Web App? I just see the default widgets in WAB or can access the GP services available in my ArcGIS server. Do I need to have a developer edition of WAB to make use of custom widgets?