Florian Müllner authored Oct 23, 2015 and Matthias Clasen committed Nov 03, 2015

The differences between the existing properties and the newly added
GtkWidget:focus-on-click property are minimal (different owner_type
in GParamSpec), so it is extremely unlikely that dropping the former
would break anything.

https://bugzilla.gnome.org/show_bug.cgi?id=757269