2002-03-22  Michael Natterer  <mitch@gimp.org>

	* app/widgets/Makefile.am
	* app/widgets/gimppreview-utils.[ch]: new file containing
	gimp_preview_type_from_viewable() so we don't need to include
	*all* vieable and preview subclasses in gimppreview.c

	* app/widgets/gimppreview.c: gimp_preview_set_viewable: never
	unset the drag source if the viewable is set to NULL (fixes dock
	tabs, thanks to sjburges), also check the passed viweable's type.

	* themes/Default/gtkrc: set the paned handle_size to 6 pixels, so
	it has the same size as the dock_separator.

	* etc/gtkrc_user: set both to 5 here, also fiddle around with
	the global focus padding and the GtkOptionMenu indicator.