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	bug 634325, fix by Alex Merry.

	of an "OK" button, closes bug 503621.

	texttagtable.

	gtkmenutoolbutton code (incase the child is rebuilt for construct-only purposes).

	  - Made all GdkColor type properties optional, closes bug 457969
	  - Disabled all the irrelevant "-set" properties of GtkTextTag.

	out as "menu" special child type.

	parentless widget references (i.e. you can add a parent to a GtkToolItemGroup's label widget
	or a GtkButton's image widget, or remove the parent of a child of a label-widget, etc).

	plugins can create command groups that play with adding/removing widgets inline without
	creating copies of them.

	parse-finished is fired (so that it can be checked when setting the final object
	properties).

	them from the layout (no longer needed trickery for the toplevel, makes parentless
	widget property references work properly).

	plugins/glade-gtk.c: Added support for editing GtkToolPalette.

	optional property to discourage its use and gave it similar treatment as the
	toolbar-style property.

	new properties and signals introduced with 3.0.

	stock items.

	gladeui/glade-popup.c, gladeui/glade-placeholder.c: Removed global selection list
	from glade-utils, selection can only be placed on widgets and only be controlled
	by their owning project.

	gladeui/glade-widget-adaptor.c, gladeui/glade-editor-property.c:
	Removed glade_util_class_implements_interface() in favor of g_type_is_a() (closes bug 455734).

	GladeEditable now watches the project for changes and updates itself by way
	of the base class implementation (and is fixed for removed widgets that no
	longer have a project pointer available), also glade_editable_block/unblock()
	is added for implementations to avoid firing implicit loads while executing
	commands... all custom editors updated to lose much code.

	  to menu items and toolitems in the menu editor (fixes bug 510083).

	crashers when focus/start-editing next cell.

	insensitive color for the < search widgets > entry.

	  of the GtkWidget adaptor this is unneeded and unused.