* gladeui/glade-widget.[ch]: Adding convenience funcs that help with
	  debugging property values in plugins: glade_widget_property_string(),
	  glade_widget_pack_property_string().

	* plugins/gtk+/glade-gtk.c, plugins/gtk+/gtk+.xml.in: Reset label/markup/use-underline 
	  properties at realize time, this fixes load time glitches with markup 
	  and mnemonics (bug 396446).


svn path=/trunk/; revision=1500