I have tried to add the editing widget into a web app while using the Tab theme. I go through the process of selecting it but it doesn't appear on the app. I then try to add it again but it is now missing from the available widgets. I've had the same thing happen with the smart editor widget.
I've then changed my theme to the Billard Theme and the edit is seen in the choose widget table. I change to the box theme and the edit tool shows already within the viewer!
My layer is definitely editable.
Is this bug or is the edit widget only meant to be use-able in certain themes??