Can't find "start in big picture" option in Advanced Host Options any more

[Cakoluchiam]

Howdy! I just connected to my remote computer using the Steam Link app for Windows, and it connected with a view onto my whole Windows desktop. Coincidentally, the loading screen tip told me I could change that option on the host computer. But when I looked for it, I cannot find that option any more. It definitely existed before because I have changed it before for rEaSoNs, but no longer. What happen?