Upsert flag enabling in UI

Description -

Why is this feature important to you - in most cases UPSERT flag is required for a dataset. the option to enable upsert flag can be done only through API. it will be good if we have this option in UI.

How would you like the feature to work - enabling UPSERT flag in UI as a toggle button.

Current Behaviour - currently UPSERT flag can be enabled only through API.