Add listTitle, or it's equivilent, attribute to <s:select> tag

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What steps will reproduce the problem?
1. N/A
2.
3.

What is the expected output? What do you see instead?
N/A

Which struts2 version?
Latest

Which struts2-jquery plugin version?
N/A

Please provide any additional information below.

Enhancement Request:

Request an enhancement to the struts2 plugin select tag. Request an additional 
attribute something like listTitle (similar to listKey and listValue) that will 
provide the property name from which to get the title attribute (tooltip) for 
the underlying option element.

Thanks.

Original issue reported on code.google.com by snyd...@llnl.gov on 18 Jun 2014 at 9:34