2001-07-09  Michael Natterer  <mitch@gimp.org>

	* app/core/gimp.[ch]: added a (commented out) function to open
	files (to get rid of including gui/file-open-dialog.h)

	* app/gui/file-open-dialog.[ch]
	* app/gui/file-save-dialog.[ch]: renamed all functions because they
	are no callbacks any more. Removed the _by_extension() callbacks.

	* app/gui/file-commands.[ch]: added the
	file_[open|save]_by_extension() callbaks here along with some
	other stuff which has nothing to do with the file dialogs.

	* app/gui/menus.c: added a helper function to create an item
	factory, cleanup.

	* app/gui/palette-editor.[ch]: contains only the editor for a
	single palette now (removed the notebook and the palette list).
	Renamed all functions to palette_editor_*(). Will be made a
	dockable later.

	* app/gui/palette-select.[ch]: made it work like the other
	selection dialogs.

	* app/app_procs.c
	* app/docindex.c
	* app/gui/dialogs-constructors.[ch]
	* app/gui/dialogs.c
	* app/gui/gradient-select.c
	* app/gui/gui.c
	* app/widgets/gimpdnd.c: changed accordingly.