Applying fix from change Ib3e0fc57 to Vector's jQuery UI styling as
it should have been fixed in both places. The on-wiki fix was removed
prematurely, as the bug was only fixed for non-Vector skins.
This fixes bad formatting of audio player on Wikipedia (see bug).
Bug: 71601
Change-Id: I80bef309dca9ea551134341037f6d96ad0f5c7e7