ICE-9339: provide a ServletContext proxy  for manipulating attributes in a portal environment

git-svn-id: http://anonsvn.icesoft.org/repo/icefaces3/trunk/icefaces@36134 1de00972-ac04-4911-a46b-06793c8d78d9
ICE-9333 - Added listControl server-side onElementUpdate marker.

git-svn-id: http://anonsvn.icesoft.org/repo/icefaces3/trunk/icefaces@36155 1de00972-ac04-4911-a46b-06793c8d78d9