Make the toolbar simpler and more useful.

--- lib/toolbar.in.orig	Mon Apr 24 05:57:48 2006
+++ lib/toolbar.in	Mon Apr 24 05:58:12 2006
@@ -4,6 +4,5 @@
 # since modifications to this file will be discarded when you
 # (re)install icewm.
 #
-prog XTerm xterm xterm
-prog FTE fte fte
-prog Netscape netscape netscape
+prog rxvt xterm rxvt
+prog Firefox mozilla firefox