[ENH]Re-restructure module params so that they can be properly shown through PluginManager also for documentation purposes, and filter param added for them.

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52616 b456876b-0849-0410-b77d-98878d47e9d5
[FIX]fix param 'since', because it has not been backported to 12.x

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@52617 b456876b-0849-0410-b77d-98878d47e9d5