Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  5afd683bf62386f25dde90199d870647b72d3e9e
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(minor) removed todo from selenium statements tests

- one bug got removed some time ago but there were
still a todo and some commented out code
- fixed a bug in the stements_bugs tests

Change-Id: Ibd6a5501b20aab78896d94248ea413fb5de6fa90