[FIX] js: Don't set Expires to +10 years and also try not to cache it (so now these two large files don't need to be downloaded every time, 10 years might be a bit much, no?)

git-svn-id: file:///var/local/code.tiki.org/tikisvn/branches/11.x@46304 b456876b-0849-0410-b77d-98878d47e9d5