I accidentally had the enableToggleSelect property set to true - which was couteracting the second click of the double-click.   Once I got rid of that property it worked as expected.

Hello to all.  You can disregard this post.  I found the solution/answer myself through more research/debugging. 

Question:   Is there certain permissions that your Cache User Account must have to use the %Library/Global query that you show in your ObjectScript example above?   I tried this example and got an error message that my account was not privileged for the operation.  I used your first ObjectScript example and just substituted my namespace, global name, and value I was searching for.

Thanks.