Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  448f8e4c4501bbc6254dcda4453cda2843aac76a

Drop iphone device stylesheet support

Search placeholder displays fine in iOS 6
Not clear which version it was specific too and unable to find
phone < iOS 6

Change-Id: I9057c07bc35f02f31a7ae42f039c964ac93a7d85