filechooserbutton: Keep track of the current_folder while the dialog is inactive
filechooserbutton: Keep track of the current_folder while the dialog is inactive

This is analogous to keeping the selection while the dialog is inactive.

Signed-off-by: Federico Mena Quintero <4999915a961edfd7686112c2935288e1266eae14@gnome.org>

johne53/MB3Gtk-2,johne53/MB3Gtk-2,Distrotech/gtk,johne53/MB3Gtk-2,Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2,Distrotech/gtk,Distrotech/gtk,johne53/MB3Gtk-2