This removes the functional use of /courier/ URLs from the portal presence tool, eliminating end-user requests to /courier/... which serve no purpose, because requesting the presence list itself also serves to establish the user's presence in a site, and the morpheus js refreshes the presence anyway.
Complete cleanup left for SAK-39977, including removal of scheduleUpdate() from headscripts.js which is referenced from some other places too (JSF widgets).
This touches a lot of code mostly because of the velocity templates. The only place this seems to be used is in the Admin / Online tool. This changes removes the auto-refresh functionality.