Updated mediawiki/extensions
Project: mediawiki/extensions/Wikibase  5ca2d22c4342c183b4a6da1b3fc98a998ba55a0f

Fixed initialization of site link tables

For site link groups that have no site, the site link table header is not displayed anymore.
With that done, the $.tablesorter widget does not cause an error due to being initialized on
a table with an empty body.

Change-Id: I08d0c822b037c3c7c555d4b48deaeca7689d6861