Code review comment for ~jbicha/network-manager:master

A bit off-topic here, but if you're going to patch the portal helper, could you also see if the window can be made to remain in the background (perhaps insert a set_keep_below call (https://developer.gnome.org/gtk3/stable/GtkWindow.html#gtk-window-set-keep-below) before the present_with_time call on line #165)? Sorry if this seems ignorant, but I don't have good knowledge of GTK+.