* gladeui/glade-command.c: Set project properly in glade_command_remove()
	  (this fixes undo/redo of add/remove commands in the menueditor... along
	  with the following fixes).

	* gladeui/glade-widget-adaptor.[ch], gladeui/glade-xml-utils.h: 
	  Added GWA_USE_PLACEHOLDERS(), a boolean on the GWA that is loaded 
	  from the catalog.

	* gladeui/glade-utils.[ch]: Removed glade_util_[any_]container_relation.

	* gladeui/glade-widget.[ch]: Added glade_widget_placeholder_relation

	* gladeui/glade-app.c, gladeui/glade-fixed.c: Adjusted callers for new
	  glade-widget api.

	* gladeui/glade-fixed.[ch]: Removed the "use-placehodlers" property
	  since it is now redundant with the new GWA_USE_PLACEHOLDERS (this
	  simplifies things a little).

	* gladeui/glade-binding.c: Fixed obnoxious startup errors (bug 399178),
	  glade_binding_get_all(), use g_list_prepend()/g_list_reverse() instead
	  of g_list_append() to build a list.

	* gladeui/glade-base-editor.c: Use the right adaptor for gwa_get_children
	  in glade_base_editor_change_type () (was using adaptor for the destination
	  type).
	
	* plugins/gtk/glade-gtk.c: Remove use of "use-placeholders" property
	  on GladeFixed objects.

	* plugins/gtk/gtk+.xml.in: Setup the "use-placeholders" attribute properly
	  (TRUE on GtkContainer, FALSE on GtkMenuShell, GtkMenuItem, GtkToolBar,
	  GtkFixed, GtkLayout).


svn path=/trunk/; revision=1057