2003-03-17  Michael Natterer  <mitch@gimp.org>

	* app/core/gimpitem.[ch]: added virtual function rename() which
	pushes an item rename undo. Added "default_name" and "rename_desc"
	to the GimpItemClass struct which are used as default values.

	* app/core/gimplayer.c: implement it and special-case floating
	selections. set item_clas->default_name and item_class->rename_desc.

	* app/core/gimpchannel.c
	* app/vectors/gimpvectors.c: set item_class->default_name and
	item_class->rename_desc.

	* app/widgets/gimpitemtreeview.[ch]: removed rename_item() virtual
	function and call gimp_item_rename().

	* app/widgets/gimpchanneltreeview.c
	* app/widgets/gimplayertreeview.c
	* app/widgets/gimpvectorstreeview.c: changed accordingly.