[FIX] modules: Pick up the defined params etc for module executed via AJAX if the moduleId is supplied in the request

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49794 b456876b-0849-0410-b77d-98878d47e9d5
[ENH] cart: Add ajax parameter to the cart module which (so far) makes the update button operate via ajax - more to come

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@49795 b456876b-0849-0410-b77d-98878d47e9d5