add demo of passing non-stock label in to gtk_dialog_new_with_buttons

add demo of passing non-stock label in to gtk_dialog_new_with_buttons

2001-09-26  Havoc Pennington  <hp@redhat.com>

	* demos/gtk-demo/dialog.c (interactive_dialog_clicked): add demo
	of passing non-stock label in to gtk_dialog_new_with_buttons

	* gtk/gtktextview.c (cursor_blinks): disable cursor blink when
	debugging updates

	* gtk/gtktextiter.h: comment about how GtkTextIter struct contents
	are private

	* gtk/gtkbutton.c (gtk_button_new_from_stock): if stock ID doesn't
	exist, fall back to mnemonic label, not plain label, bug #61184