Update Wikidata

* fix wbsearchentities continue param
* more robustness for output page js config variables
* fix Special:NewItem page
* fix issue with entity selector
* fix fatal error in Special:SetSiteLink
* fix fatal error in Special:SetLabel and SetDescription
* fix misleading summary message in Special:SetSiteLink

Change-Id: I6ffb304d3c0e2847dc0b6324cd5d9e74beb73737