Updated mediawiki/extensions
Project: mediawiki/extensions/MobileFrontend  a4787d289cd96f0fc8c5a9ca3da560c610226184
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rewrite processDiff using xpath

this is to ensure it works with wikidiff2 as well as wikidiff1
some minor styling changes
also arrange the del and ins items by occurance in the diff.
order is important

Change-Id: Id644ea9734bdbda6627af23312a78e60e7a728be