Replace deprecated SpecialPage::resolveAliasWithSubpage()

Change-Id: Ief831cb53978064fce1847c31d91f6953358966d
Localisation updates from https://translatewiki.net.

Change-Id: Ia415219f6a0100a770822be147a610c182c4df7b
Migrate to JSON i18n

Procedure per https://www.mediawiki.org/wiki/Manual:GenerateJsonI18n.php
with shim.

Change-Id: If5da23af211ee3f5829e30f37fa6d389c0e1c770