Remove an old scrolledlistbox function. Add some minor improvements.

2002-11-07  Martin M. Hunt  <hunt@redhat.com>

	* library/util.tcl (CygScrolledListbox): Delete.

	* library/srctextwin.itb: Change from CygScrolledListbox
	to iwidgets::scrolledlistbox. Set foreground and background.
	Center popup over source window.