RFR (XS): 7023754 JConsole Javascript plugin demo throws exception on window.print

[Erik Gahlin]

Could I please have a review of a fix that allows a script in the 
jconsole script plug-in to call print method in ScriptShellPanel class.

Bug:
http://monaco.us.oracle.com/detail.jsf?cr=7023754
Webrev:
http://cr.openjdk.java.net/~egahlin/7023754/src/share/demo/scripting/jconsole-plugin/src/com/sun/demo/scripting/jconsole/ScriptShellPanel.java.sdiff.html

Tested by running reproducer in bug report.

Thanks
Erik