Update on Infusion Builder

[Li, Cindy]

Hi all,

I've fixed the cosmetic and screen reader issues discovered from yesterday. A new patch has been attached to JIRA and the test site is re-generated with the new patch.

Jira: http://issues.fluidproject.org/browse/FLUID-3233
Test site: http://forge.fluidproject.org/infusionBuilder-test/website/docs/infusionBuilder/html/InfusionBuilder.html

A quick update of what are improved in the new patch:

1. A workaround for firefox spinner bug: embed a hidden iframe to download build;
2. Use http status code to identify server success or fail response;
3. Move spinner out of download button so the disable opacity only applies to button not the spinner.

Colin, can you review the patch and let me know if any concerns. Thanks.

Cindy