It is an outstanding improvement of ArcGIS Online that from now on it has a Data tab where you can view, analyze and edit data directly in the data table.
However, the ability to edit data directly is somehow dangerous because it is the easiest way to corrupt your data. In this case, it would be great to have an edit session or at least a save button for data editing in Data tab. Just like it is in Smart mapping widget in Web AppBuilder.
