Work around some weird Netscape bug that confuses the help button onSubmit...

Work around some weird Netscape bug that confuses the help button onSubmit method with the shutdown onSubmit method.

lib/python/App/cpContents.dtml

@@ -10,7 +10,7 @@
 The Control Panel provides access to system management functions,
 such as database and product management.  
 
-<FORM ACTION="manage_shutdown" METHOD="POST">
+<FORM ACTION="manage_shutdown" METHOD="POST" onSubmit="">
 
 <ul>
 <li><em>Zope</em> version: <dtml-var version_txt>