Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  20d19e627c3db2282919d0b85fabe6574f8cc9b1

Move special page code out of Lib

This moves SpecialWikibaseQueryPage and SpecialWikibasePage out of lib.

There was one page in Client using those, which now got the code inlined.
After inlining it, further refactoring was done to remove now not needed complexity.

Change-Id: I5b3e76af8b29e9da4a392e42f3dc9c2016fbf04f