[FIX] Sessions in database would not work

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51580 b456876b-0849-0410-b77d-98878d47e9d5
added class modal-content to export calendars form

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/13.x@51582 b456876b-0849-0410-b77d-98878d47e9d5