[FIX] Make sure the current URL is in the trusted uris for smarty

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51525 b456876b-0849-0410-b77d-98878d47e9d5
[FIX] When rendering for an external context, such as a notification, make sure we provide a full URL for icons, and that cache does not interfere

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51526 b456876b-0849-0410-b77d-98878d47e9d5