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GTK+ 2.17.10 is now the required version
I've used all the GTK+ 2.18.* api available, still missing:
GTK_WIDGET_UNSET_FLAGS (widget, GTK_TOPLEVEL);
GTK_WIDGET_SET_FLAGS (widget, GTK_REALIZED);
GTK_WIDGET_REALIZED ()
GTK_WIDGET_MAPPED ()
GTK_VIEWPORT ()->bin_window
GTK_ENTRY ()->editing_canceled

https://bugzilla.gnome.org/show_bug.cgi?id=594957

	* plugins/gtk+/gtk+.xml.in, plugins/gtk+/glade-gtk.c: Disable default saving behaviour of order dependant
	GtkAdjustment properties and installed glade_gtk_adjustment_write_widget() to write the properties out
	in the following order: "lower", "upper", "value" (fixes bug 578484).

Reviewed by: Petr Kovar.

Fixing permissions.

copied subhierarchy still come out as copies (like getting an action area
inside an internal vbox which was copied).

* gladeui/glade-widget.c: Fixed crasher while copying internal widgets (bug 595156)

 * Fixes part of bug 591923

	objects (bug 566928).