Upgrade jQuery to 1.4.1.
Upgrade jQuery to 1.4.1.

See:
 - http://jquery14.com/day-01/jquery-14 for the 1.4 release notes
 - http://jquery14.com/day-12 for the 1.4.1 release notes.

Closes #9019.

pkdevbox/trac,pkdevbox/trac,pkdevbox/trac,pkdevbox/trac