Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  f5acc4dcdccef6aaff94b7bca7f2b6d3ad7199bd
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don't hijack image links (bug 43539)

also restrict to beta - this shouldn't have leaked into non-beta

Change-Id: I0823376c24d9807a8d50ab225f90a2281f6dbc86