Support jQuery UI 1.11

[rxaviers]

This issue is only a checklist reminder of 1.11 changes jquery-wp-content needs to support:

• Effects (core): Unite demos into the same single effect/ path jquery-ui#982

[rxaviers]

https://github.com/jquery/jquery-wp-content/tree/ui-effects-demos

[scottgonzalez]

Both of these have landed now.