Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  8ab63d97e555550cf187e8e3d4fda7a9eafc10c3

Story 1030: Clean up CSS

In the process remove old unused watchlist icons and remove horizontal
scrollbar in watchlist.

Change-Id: If6bd9916e6a0704781b9b67f4c41eb59217f8ddb