[bp/r48008] tablesorter: update to v2.11.1. Adding this to avoid conflict with 12.x and trunk. Next will add next version (2.12.0) and then remove this one after updating composer

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/12.x@48086 b456876b-0849-0410-b77d-98878d47e9d5