Media: Remove another unused string.

props pavelevap.
see #29741.

git-svn-id: https://develop.svn.wordpress.org/trunk@30342 602fd350-edb4-49c9-b593-d223f7449a82
Sync our jQuery UI styles with jQuery UI 1.11.2 CSS.

Removes also our own implementations for touch-action compatibility for IE Touch.

props georgestephanis, ocean90.
fixes #26843.

git-svn-id: https://develop.svn.wordpress.org/trunk@30343 602fd350-edb4-49c9-b593-d223f7449a82