Thanks! I just had this question myself. Apparently, I had disabled it without knowing what it was in my app.
Personally, putting this setting and other related settings (“Use horizontal scrolling,” etc.) only in the “Options” part of the editor strikes me as a little counterintuitive. It would be nice if they could be in the UX --> Views section of the table one is actually working on, but I guess these are global setting for the entire app, and that’s why they are in UX --> Options. But why do they need to be a global settings? If there’s a need to turn them on and off depending on the app, it would seem to me that one might wnat to turn them on and off for each individual view.
Another possibility is to display the relevant “Options” settings in the “Views” area in a greyed out style (to indicate that they can’t be change there) when “table” is selected. A note might be added that they can be changed in the “Options” part of the app editor. I think I’ll make a separate post suggesting this.