Remove registrant from "Look who else is coming"

[MeganW40]

We should be able to edit registrants choice of "allow others to see I have registered" option. I have a registrant that left it checked when she registered, but now realizes she would like it unchecked, because anyone visiting our registration website can see she will be out of town for our event. she is concerned for the safety of her home. We can change everything else about the registrants, but not that.