
Commit e98eb57e3e8b added flags to expand the dialog's background stack, which works fine with the current clutter-1.16 branch, but breaks on clutter-1.14 (as shipped with GNOME 3.8). Using an St.Widget with a Clutter.BinLayout fixes this, and is more modern Clutter usage. https://bugzilla.gnome.org/show_bug.cgi?id=699877