Partially undo failed revert of "Update jquery.ui Vector theme to 1.9.2"
Follows-up
36b8e0e10ff which claims to revert
7bb0c9a01e, but
really just made a gigantic mess of the place and managed to somehow
partially undo the jQuery UI upgrade to 1.9 (
3cb2ccd87863abb8a) which
breaks in all kinds of interesting ways because the stylesheets
it added instead are from jQuery UI 1.8 and naturally incompatible.
This restores resources/lib/jquery.ui from the mediawiki-core
tree at
977b5ea0e090 (parent of
7bb0c9a01e).
Change-Id: Ie3bcd8560fe5012ed616fc341e036e8614b5208c