Bug 711298 - "Edit Scheduled Transaction" window way too modal

Put dialogs and utility windows in the same level as normal and
toolbar windows so that Gtk can control their stacking instead of
forcing them, rather unnaturally, to be on top of all other windows,
even other application windows, even when another application has
focus.
Merge branch 'gtk-2-24' of git://git.gnome.org/gtk+ into gtk-2-24
JOHNE - Create (i.e. ensure the existence of) any folders that we'll need at build time