* gladeui/glade-editor-property.c: Fixed invisible labels in
	the menu editor.

	* gladeui/glade-widget.c, gladeui/glade-widget.h, gladeui/glade-xml-utils.c,
	gladeui/glade-utils.c, gladeui/glade-xml-utils.h, gladeui/glade-utils.h,
	gladeui/glade-property.c, gladeui/glade-property-class.c,
	gladeui/glade-property-class.h, gladeui/glade-project.c, gladeui/glade-project.h:
	implemented "factory-stock-id" in the catalog, this allows you to take a resource
	image file property formerly hacked as a custom property in libglade, and glade
	will generate a hidden icon factory in builder files so that it will be loaded
	through the stock system instead, "factory-stock-id" depicts the name of the
	stock property of the property-class in question.


svn path=/trunk/; revision=1796