2006-05-28  Michael Natterer  <mitch@gimp.org>

	Applied patch from David Gowers which adds actions to select
	palette and colormap colors with actions. Modified the patch quite
	a bit. Fixes bug #130123.

	* app/widgets/gimpcolormapeditor.[ch]
	* app/widgets/gimppaletteeditor.[ch]: add functions get_index()
	which gets the currently selected color's index (optionally the
	index of a passed color), set_index() which sets the selected
	color by index, and max_index() which returns the maximum possible
	color index.

	* app/dialogs/dialogs-constructors.c: changed accordingly.

	* app/actions/context-actions.c
	* app/actions/context-commands.[ch]: actions and callbacks which
	use the new functions.