I have a web mapping application that I started building in arcgis.com using out-of-the-box functionality provided by WAB. However, I found I needed to customize one of the widgets, and so brought the app into WAB Developer on my desktop. I modified the source code for the widget and am now ready to deploy the app. Is there a way to push the whole thing back onto arcgis.com so that it is served there off of my organizational account? The WAB documentation makes it sound as if a customized application has to be deployed on your own web server.
Alternatively, is there a way to modify the source code of the application while it still resides in arcgis.com (without pulling it into WAB Developer)?