filechooserbutton: In the tests, run through the dialog more than one time
filechooserbutton: In the tests, run through the dialog more than one time

This ensures that data maintained by the button while the dialog opens/closes remains consistent.

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

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