OF-2418: Update implemenation of /js/setup.js to not use Scriptaculous
OF-2418: Update implemenation of /js/setup.js to not use Scriptaculous

The /js/setup.js file contains one function. Its purpose is to toggle the visibility of a HTML panel.

This commit updates the implementation in a way that is backwards compatible, but no longer depends on other Javascript libraries.

igniterealtime/Openfire,guusdk/Openfire,igniterealtime/Openfire,igniterealtime/Openfire,guusdk/Openfire,guusdk/Openfire,igniterealtime/Openfire,guusdk/Openfire,igniterealtime/Openfire,guusdk/Openfire