Updated mediawiki/extensions
Project: mediawiki/extensions/MultimediaViewer  1804f98ee767bdf043b1b6be1cd52fa2b1b062e8

Replace $.fn.msg calls by mw.message

$.fn.msg breaks on beta for an unknown reason
Switching to mw.message which is used elsewhere in mmv

Change-Id: Id569df019c03b2f11fb513fcd3ed9ffc6eac7e91