2004-11-23  Michael Natterer  <mitch@gimp.org>

	* app/widgets/gimpwidgets-utils.[ch]: added new function
	gimp_toggle_button_set_visible() which can be used as "toggled"
	callback on a GtkToggleButton and sets a widget (in)visible
	according to the toggle's "active" state.

	* app/tools/gimpblendoptions.c
	* app/tools/gimppaintoptions-gui.c
	* app/tools/gimpselectionoptions.c: use it to hide (rather than
	just insensitize) the seldomly used "Feather edges", "Autoshrink
	selection", "Adaptive supersampling", "Fade out" and "Use color
	from gradient" widgets when their enabling toggle is unchecked.
	Makes the affected tool options much less crowded and noisy in
	their default appearance. Fixes bug #159008.